JP7336444B2 - DOUBLE WALL CONTAINER, DOUBLE WALL CONTAINER MANUFACTURING METHOD AND INVERSION DEVICE - Google Patents

DOUBLE WALL CONTAINER, DOUBLE WALL CONTAINER MANUFACTURING METHOD AND INVERSION DEVICE Download PDF

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JP7336444B2
JP7336444B2 JP2020538343A JP2020538343A JP7336444B2 JP 7336444 B2 JP7336444 B2 JP 7336444B2 JP 2020538343 A JP2020538343 A JP 2020538343A JP 2020538343 A JP2020538343 A JP 2020538343A JP 7336444 B2 JP7336444 B2 JP 7336444B2
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wall
wall portion
double
container
walled container
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JPWO2020040036A1 (en
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要一 土屋
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Nissei ASB Machine Co Ltd
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Nissei ASB Machine Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3865—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers
    • B65D81/3869—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers formed with double walls, i.e. hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/02—Combined thermoforming and manufacture of the preform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
    • B65D43/0231—Removable lids or covers without integral tamper element secured by rotation only on the outside, or a part turned to the outside, of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0771—Wide-mouth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0031—Making articles having hollow walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
    • B29C49/4283—Deforming the finished article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2024/00—Articles with hollow walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7132—Bowls, Cups, Glasses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00222—Hollow and made of one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00574—Contact between the container and the lid secured locally, i.e. a lot less than half the periphery

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Making Paper Articles (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

本開示は、断熱（保温・保冷）効果を有する樹脂製の二重壁容器、当該二重壁容器の製造方法及び反転装置に関する。 TECHNICAL FIELD The present disclosure relates to a resin double-walled container having a heat insulating (warm/cold) effect, a method for manufacturing the double-walled container, and an inverting device.

従来、各種飲料や氷菓子等を収容するための容器として樹脂製容器が広く用いられている。また樹脂製容器の一つとして、例えば、内壁部と外壁部との内外二重壁状の構造となっている二重壁容器が知られている。この二重壁容器は、内壁部と外壁部との間に空間（空気断熱層）が設けられており、温かい飲料や冷たい飲料等を収容した際に、保温効果または保冷効果が発揮されるように構成されている。 2. Description of the Related Art Conventionally, resin containers have been widely used as containers for containing various beverages, ice confectionery, and the like. As one of resin containers, for example, a double-walled container having an inner-outer double-walled structure of an inner wall portion and an outer wall portion is known. This double-walled container has a space (air insulation layer) between the inner wall and the outer wall, so that when hot or cold beverages are stored, the heat or cold insulation effect is exhibited. is configured to

このような二重壁容器は、一般的に、別々に形成された内方容器と外方容器とを組み合わせることで製造されていた。内容容器と外方容器とが組み合わされた二重壁容器は、強度が比較的高く、保温効果および保冷効果も比較的高い。しかしながら、製造工程が煩雑であるという欠点がある。 Such double-walled containers have generally been manufactured by combining separately formed inner and outer containers. A double-walled container in which an inner container and an outer container are combined has relatively high strength, and also has relatively high heat-retaining and cold-retaining effects. However, there is a drawback that the manufacturing process is complicated.

近年では、製造工程の煩雑さを解消するために、ブロー成形した中間成形体を変形させることで形成された二重壁容器も提案されている。具体的には、上記内方容器に相当する内壁形成部が、上記外方容器に相当する外壁形成部から反転膨出した形状の中間成形体をブロー成形にて製造し、この中間成形体の内壁形成部を外壁形成部の内側方向に折り返す（反転させる）ことで二重壁容器とする技術が提案されている（例えば、特許文献１，２参照）。 In recent years, in order to eliminate the complexity of the manufacturing process, a double-walled container formed by deforming a blow-molded intermediate product has also been proposed. Specifically, an intermediate molded body having a shape in which the inner wall forming portion corresponding to the inner container is inverted and swollen from the outer wall forming portion corresponding to the outer container is manufactured by blow molding, and the intermediate molded body Techniques for forming a double-walled container by folding back (inverting) the inner wall-forming portion toward the inner side of the outer wall-forming portion have been proposed (see Patent Documents 1 and 2, for example).

日本国特開昭５８－３０９６９号公報Japanese Patent Laid-Open No. 58-30969 日本国特開２００４－１２３１４６号公報Japanese Patent Application Laid-Open No. 2004-123146

上述のようにブロー成形により中間体成形体を形成し、中間成形体の内壁形成部を外壁形成部の内側方向に折り返して（反転させて）二重壁容器とすることで、二重壁容器の製造工程を簡略化することができ、製造効率は向上する。 As described above, the intermediate molded body is formed by blow molding, and the inner wall forming part of the intermediate molded body is folded back (inverted) toward the inner side of the outer wall forming part to form a double-walled container. manufacturing process can be simplified, and manufacturing efficiency is improved.

しかしながら、中間成形体の内壁形成部を反転させて形成した二重壁容器では、例えば、飲料を収容した状態で持ち上げた際などに、十分な強度を確保できず、容器が変形してしまうという問題がある。具体的には、内壁部と外壁部との境界部分、つまり飲料が収容される凹部の開口縁部（口部）において、十分な強度が得られない場合がある。 However, in a double-walled container formed by inverting the inner wall forming part of the intermediate molded body, for example, when the container is lifted while containing a beverage, sufficient strength cannot be secured and the container is deformed. There's a problem. Specifically, sufficient strength may not be obtained at the boundary portion between the inner wall portion and the outer wall portion, that is, the opening edge portion (mouth portion) of the recess in which the beverage is accommodated.

本開示は、製造工程を簡略化でき且つ凹部の開口縁部における強度を向上することができる二重壁容器の製造方法及び反転装置を提供することを目的とする。 An object of the present disclosure is to provide a method of manufacturing a double-walled container and an inverting device capable of simplifying the manufacturing process and improving the strength of the opening edge of the recess.

さらに、本開示は、凹部の開口縁部における強度の向上を図った二重壁容器を提供することも目的とする。 A further object of the present disclosure is to provide a double-walled container with improved strength at the opening edge of the recess.

また、開口縁部は折り返し部位に形成される関係上、精度良く賦形させることは一般的に困難である。例えば、折り返し後の開口縁部の天面（上端面）はうねった形状になり易く（平坦形状にならず）、その円周方向の幅厚も不均一になり易い。 In addition, since the edge of the opening is formed at the folded portion, it is generally difficult to form the edge with high accuracy. For example, the top surface (upper end surface) of the opening edge after folding tends to be wavy (not flat), and the width in the circumferential direction tends to be uneven.

ところで、樹脂製容器には、凹部の開口を塞ぐ蓋部材を装着可能に構成されているものがある。例えば、カップ状の容器の外周面又は内周面に溝部を設けると共に、溝部に対応する突出部を蓋部材に設け、突出部と溝部とが係合することで、蓋部材が容器に固定されるようになっているものがある。二重壁容器についても、このような構造を採用することが考えられる。 By the way, some resin containers are configured so that a lid member that closes the opening of the recess can be attached. For example, a groove is provided on the outer peripheral surface or the inner peripheral surface of a cup-shaped container, a protrusion corresponding to the groove is provided on the lid member, and the protrusion and the groove are engaged to fix the lid member to the container. There is something like Adopting such a structure is also conceivable for a double-walled container.

しかしながら、二重壁容器に蓋部材を装着するための溝部を設けた場合、凹部の開口縁部の強度がさらに不足してしまう虞がある。また、上述のように中間成形体の内壁形成部を外壁形成部の内側方向に折り返す方法で二重壁容器を形成する場合、中間成形体の段階で溝部が形成されていると、内壁形成部を折り返した際、凹部の開口縁部を精度よく賦形させことは一層困難になり、しわが形成されてしまうといった問題が生じる虞もある。よって、蓋部材を良好に装着できる程度の強度と形状精度を有した開口縁部がある二重壁容器を上記方法で製造することは極めて難しい。 However, when the groove for attaching the lid member is provided in the double-walled container, there is a possibility that the strength of the opening edge of the recess may become insufficient. Further, when the double-walled container is formed by folding the inner wall-forming portion of the intermediate molded body toward the inner side of the outer wall-forming portion as described above, if the groove is formed at the stage of the intermediate molded body, the inner wall-forming portion It becomes more difficult to accurately shape the opening edge of the recessed portion when the sheet is folded back, and there is a possibility that wrinkles may be formed. Therefore, it is extremely difficult to manufacture a double-walled container having an opening edge with sufficient strength and shape accuracy to allow the lid member to be attached satisfactorily by the above method.

本開示は、蓋部材を装着可能な構造を有していても、開口縁部に十分な強度や形状精度を確保することができる二重壁容器を提供することも目的とする。 Another object of the present disclosure is to provide a double-walled container capable of ensuring sufficient strength and shape accuracy at the edge of the opening even if it has a structure in which a lid member can be attached.

上記課題を解決する本開示の一つの態様は、容器の内面を形成する内方胴部及び内方底部を有する内壁部と、前記内壁部の上端から連続して前記内壁部とは隙間を空けて設けられて前記容器の外面を形成する外方胴部を有する外壁部と、を備える二重壁容器の製造方法であって、前記外壁部となる外壁形成部と、前記内壁部となり前記外壁形成部の深さ方向の外側に膨出した内壁形成部と、前記内壁形成部と前記外壁形成部との境界部分に設けられて前記外壁形成部の径方向外側に突出する突出部と、を有する中間成形体をブロー成形により形成するブロー成形工程と、前記内壁形成部を前記外壁形成部の内側に押し込んで反転させることで前記中間成形体を前記二重壁容器とする反転工程と、前記反転工程の前に実施され、前記中間成形体の深さ方向で前記突出部を圧潰して前記内壁形成部と前記外壁形成部との境界部分に折り目を付ける圧潰工程と、を含む二重壁容器の製造方法にある。 One aspect of the present disclosure for solving the above problems is an inner wall portion having an inner trunk portion and an inner bottom portion that form the inner surface of a container, and a gap is provided between the inner wall portion and the inner wall portion continuously from the upper end of the inner wall portion. A method for manufacturing a double-walled container comprising: an outer wall portion having an outer body portion forming the outer surface of the container, the outer wall forming portion serving as the outer wall portion; and the outer wall serving as the inner wall portion. An inner wall forming portion that bulges outward in the depth direction of the forming portion, and a projecting portion that is provided at a boundary portion between the inner wall forming portion and the outer wall forming portion and protrudes radially outward from the outer wall forming portion. a blow molding step of forming an intermediate molded body having the a crushing step that is performed before the reversing step and crushes the protruding portion in the depth direction of the intermediate molded body to crease the boundary portion between the inner wall forming portion and the outer wall forming portion. It is in the manufacturing method of the container.

ここで、前記反転工程は、前記突出部を圧潰した状態で実施されることが好ましい。 Here, it is preferable that the reversing step is performed in a state in which the protruding portion is crushed.

また前記圧潰工程では、前記突出部を所定温度に調整した状態で当該突出部を圧潰することが好ましい。 Further, in the crushing step, it is preferable to crush the projecting portion while adjusting the temperature of the projecting portion to a predetermined temperature.

また本開示は、このような製造方法に用いられる反転装置であって、一方の端面に開口し、前記突出部が前記端面上に突出した状態に前記中間成形体の前記外壁形成部が収容される収容凹部を備える収容金型と、前記収容凹部の開口縁部に環状に配置されると共に前記中間成形体の深さ方向で移動可能に構成され、前記収容金型の前記端面に対して前記突出部を押圧する環状押圧金型と、前記中間成形体の深さ方向で移動可能に構成され、前記内壁形成部をその底部側から押圧して前記外壁形成部の内側に押し込んで反転させる凸状押圧金型と、を備える反転装置にある。 Further, the present disclosure is a reversing device used in such a manufacturing method, in which the outer wall forming portion of the intermediate molded body is accommodated in a state in which one end face is opened and the projecting portion protrudes above the end face. and a housing mold that is arranged annularly at an opening edge of the housing recess and is configured to be movable in the depth direction of the intermediate molded body, and the and an annular pressing mold for pressing the protruding portion, and a protrusion which is configured to be movable in the depth direction of the intermediate molded body and which presses the inner wall forming portion from its bottom side to push it into the outer wall forming portion and turn it over. and a reversing device comprising a shaped pressing mold.

ここで、前記凸状押圧金型は、前記環状押圧金型と前記収容金型とによって前記突出部を圧潰した状態で、前記中間成形体の深さ方向で移動可能に構成されていることが好ましい。 Here, the convex pressing die is configured to be movable in the depth direction of the intermediate molded body in a state where the projecting portion is crushed by the annular pressing die and the housing die. preferable.

また反転装置は、前記中間成形体の前記突出部を所定温度に調整する温調装置を備えていることが好ましい。さらに前記温調装置は、前記環状押圧金型の温度を調整するものであることが好ましい。 Moreover, it is preferable that the reversing device includes a temperature control device for adjusting the protrusion of the intermediate molded body to a predetermined temperature. Furthermore, it is preferable that the temperature control device adjusts the temperature of the annular pressing mold.

また、上記課題を解決する本開示の一つの態様は、容器の内面を形成する内方胴部及び内方底部を有する内壁部と、前記内壁部の上端から連続して前記内壁部とは隙間を空けて設けられて前記容器の外面を形成する外方胴部を有する外壁部と、を備え、前記内壁部と前記外壁部との境界部分には、前記内壁部と前記外壁部とを圧潰して折り目を付けた圧潰部が周方向に亘って設けられており、前記圧潰部を構成する前記内壁部と前記外壁部との隙間は、前記内方胴部と前記外方胴部との隙間よりも狭くなっている二重壁容器にある。 Further, one aspect of the present disclosure for solving the above problems is an inner wall portion having an inner trunk portion and an inner bottom portion forming an inner surface of a container, and a gap between the inner wall portion and the inner wall portion continuously from the upper end of the inner wall portion. and an outer wall portion having an outer body portion that forms the outer surface of the container with a gap between the inner wall portion and the outer wall portion. A crushing portion with a crease is provided along the circumferential direction, and a gap between the inner wall portion and the outer wall portion constituting the crushing portion is a gap between the inner trunk portion and the outer trunk portion. It is in a double-walled container that is narrower than the gap.

ここで、前記圧潰部を構成する前記内壁部の前記内方胴部との境界部分には、前記外壁部側を凸として湾曲する内湾曲部が形成されていると共に、前記圧潰部を構成する前記外壁部の前記外方胴部との境界部分には、前記内壁部側を凸として湾曲する外湾曲部が形成されており、前記内湾曲部と前記外湾曲部との隙間が、前記圧潰部の他の部分の隙間よりも狭くなっていることが好ましい。 Here, at a boundary portion between the inner wall portion constituting the crushing portion and the inner trunk portion, an inner curved portion is formed so as to be convex toward the outer wall portion side, and constitute the crushing portion. An outer curved portion that curves convexly toward the inner wall portion is formed at a boundary portion between the outer wall portion and the outer trunk portion. It is preferable that the gap is narrower than the gap in other parts of the part.

また前記圧潰部は、前記内壁部及び前記外壁部が前記外方胴部の径方向の外側に突出する環状フランジ部を構成していることが好ましい。つまり二重壁容器の開口縁部には、圧潰された環境フランジ部が設けられていることが好ましい。 Moreover, it is preferable that the crushing portion constitutes an annular flange portion in which the inner wall portion and the outer wall portion protrude outward in a radial direction of the outer trunk portion. Thus, the opening edge of the double-walled container is preferably provided with a crushed environmental flange.

また、上記課題を解決する本開示の一つの態様は、一端側が開口する凹部の内面を形成する内方胴部を有する内壁部と、前記内壁部から連続して当該内壁部とは隙間を空けて設けられて容器の外面を形成する外方胴部を有する外壁部と、を備える二重壁容器であって、前記内壁部又は前記外壁部の一方は、前記開口側の端部に当該開口を覆う蓋部材が装着される装着部を有し、該装着部には、前記蓋部材が備える複数の突起部が係合される複数の係合溝が設けられており、且つ前記内壁部と前記外壁部との境界部分には、前記装着部を補強するための補強部が周方向に沿って設けられている二重壁容器にある。 In addition, one aspect of the present disclosure for solving the above problems is an inner wall portion having an inner body portion forming an inner surface of a recessed portion that is open at one end, and a gap between the inner wall portion and the inner wall portion that is continuous from the inner wall portion. and an outer wall having an outer body forming the outer surface of the container, one of the inner wall or the outer wall having the opening at the open end. The mounting portion is provided with a plurality of engagement grooves with which a plurality of protrusions of the lid member are engaged, and the inner wall portion and the In the double-walled container, a reinforcing portion for reinforcing the mounting portion is provided along the circumferential direction at the boundary portion with the outer wall portion.

かかる本開示の二重壁容器では、容器の周方向に沿って設けられた補強部によって装着部の強度が向上する。したがって、蓋部の突起部が係合する係合溝が装着部に形成されていても、装着部の変形が抑制される。すなわち、係合溝が装着部に形成されていても、開口縁部における容器の変形が抑制される。 In such a double-walled container of the present disclosure, the reinforcing portion provided along the circumferential direction of the container improves the strength of the mounting portion. Therefore, deformation of the mounting portion is suppressed even if the mounting portion is formed with an engagement groove that engages with the projection of the lid portion. That is, deformation of the container at the opening edge is suppressed even if the engagement groove is formed in the mounting portion.

ここで、前記装着部には、前記開口側の端部から前記係合溝に向かって延在し前記係合凸部を前記係合溝に誘導する誘導溝が設けられ、前記補強部は、前記誘導溝の底面から突出するように前記誘導溝の前記開口側の端部に設けられ、かつ前記装着部の表面よりも高さの低い補強リブを含むことが好ましい。これにより、開口縁部における容器の強度をより効果的に向上することができる。 Here, the mounting portion is provided with a guiding groove that extends from an end on the opening side toward the engaging groove and guides the engaging convex portion to the engaging groove, and the reinforcing portion includes: It is preferable that a reinforcing rib is provided at the opening-side end of the guide groove so as to protrude from the bottom surface of the guide groove and has a height lower than the surface of the mounting portion. Thereby, the strength of the container at the opening edge can be more effectively improved.

また、前記内壁部と前記外壁部とは、前記開口側の端面を形成する連結部を介して連結されており、前記補強部は、前記連結部の前記装着部側の端部から離間した位置に突出して設けられて円周方向に亘って連続する環状リブを含むことが好ましい。これにより、開口縁部における容器の強度をより効果的に向上することができる。 In addition, the inner wall portion and the outer wall portion are connected via a connecting portion forming an end face on the opening side, and the reinforcing portion is positioned away from the end portion of the connecting portion on the mounting portion side. It preferably includes an annular rib that protrudes from and extends circumferentially. Thereby, the strength of the container at the opening edge can be more effectively improved.

さらに、前記環状リブの側面と前記連結部の表面とで形成される隅部の角度が鋭角であることが好ましい。これにより、開口縁部における容器の強度をより効果的に向上することができる。 Furthermore, it is preferable that a corner formed by the side surface of the annular rib and the surface of the connecting portion has an acute angle. Thereby, the strength of the container at the opening edge can be more effectively improved.

また、前記装着部が、前記内壁部に設けられており、前記補強部は、前記内壁部と前記外壁部との境界部分に設けられて前記内壁部及び前記外壁部が前記外壁部を構成する外方胴部よりも外側に突出した環状フランジ部を含むことが好ましい。これにより、開口縁部における容器の強度をより効果的に向上することができる。 Further, the mounting portion is provided on the inner wall portion, and the reinforcing portion is provided on a boundary portion between the inner wall portion and the outer wall portion, and the inner wall portion and the outer wall portion constitute the outer wall portion. It preferably includes an annular flange projecting outwardly from the outer barrel. Thereby, the strength of the container at the opening edge can be more effectively improved.

さらに前記環状フランジ部は、前記内壁部と前記外壁部とを圧潰して折り目を付けることによって形成されており、当該環状フランジ部を構成する前記内壁部と前記外壁部との隙間は、前記内方胴部と前記外方胴部との隙間よりも狭くなっていることが好ましい。これにより、開口縁部における容器の強度をより効果的に向上することができる。 Further, the annular flange portion is formed by crushing the inner wall portion and the outer wall portion to form a crease, and the gap between the inner wall portion and the outer wall portion that constitute the annular flange portion is the inner wall portion. It is preferable that the gap is narrower than the gap between the square barrel portion and the outer barrel portion. Thereby, the strength of the container at the opening edge can be more effectively improved.

かかる本開示の二重壁容器の製造方法によれば、内壁部と外壁部との境界部分に折り目が付けられた二重壁容器、すなわち凹部の開口縁部に内壁部及び内壁部が圧潰された圧潰部を有する二重壁容器を、比較的容易に製造することができる。また凹部の開口縁部に圧潰部を設けることで、二重壁容器の強度を高めることができる。つまり本開示の二重壁容器の製造方法によれば、凹部の開口縁部における強度を向上した二重壁容器を比較的容易に製造することができる。 According to the method for manufacturing the double-walled container of the present disclosure, the double-walled container having the crease at the boundary between the inner wall and the outer wall, that is, the inner wall and the inner wall are crushed at the opening edge of the recess. A double-walled container having a flattened portion can be manufactured relatively easily. Further, by providing the crushed portion at the opening edge of the recess, the strength of the double-walled container can be increased. That is, according to the method for manufacturing a double-walled container of the present disclosure, it is possible to relatively easily manufacture a double-walled container with improved strength at the opening edge of the recess.

かかる本開示の二重壁容器によれば、凹部の開口縁部に圧潰部が設けられていることで、二重壁容器の強度が高められる。特に、凹部の開口縁部に環状フランジ部が設けられ、この環状フランジ部が圧潰部で構成されているようにすることで、二重壁容器の強度がさらに高められる。これにより、例えば、二重壁容器内に飲料等が収容された状態でも、二重壁容器の変形が抑制される。 According to the double-walled container of the present disclosure, the strength of the double-walled container is enhanced by providing the crushed portion at the opening edge of the recess. In particular, the strength of the double-walled container can be further enhanced by providing an annular flange portion at the opening edge of the recess and configuring the annular flange portion as the crushed portion. As a result, for example, deformation of the double-walled container is suppressed even when a beverage or the like is contained in the double-walled container.

また、本開示の二重壁容器によれば、蓋部を装着可能な構造としても、補強部を設けることで開口縁部における容器の強度の向上することができる。すなわち補強部により二重壁容器の強度を十分に確保することができる。したがって、二重壁容器内に飲料等が収容された状態でも、変形が抑制され、蓋部材を良好に装着することができる。 In addition, according to the double-walled container of the present disclosure, even if the structure is such that the lid can be attached, the strength of the container at the opening edge can be improved by providing the reinforcing portion. That is, the strength of the double-walled container can be sufficiently ensured by the reinforcing portion. Therefore, even when a beverage or the like is contained in the double-walled container, deformation is suppressed, and the lid member can be attached satisfactorily.

図１は、本開示の第一実施形態に係る二重壁容器を示す断面図である。1 is a cross-sectional view of a double-walled container according to a first embodiment of the present disclosure; FIG. 図２は、本開示の第一実施形態に係る二重壁容器の拡大断面図である。2 is an enlarged cross-sectional view of a double-walled container according to the first embodiment of the present disclosure; FIG. 図３Ａは、本開示の第一実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 3A is a diagram illustrating a method of manufacturing a double-walled container according to the first embodiment of the present disclosure; 図３Ｂは、本開示の第一実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 3B is a diagram illustrating a method of manufacturing a double-walled container according to the first embodiment of the present disclosure; 図４は、本開示の第一実施形態に係る反転装置の概略構成を説明する図である。FIG. 4 is a diagram illustrating a schematic configuration of the reversing device according to the first embodiment of the present disclosure. 図５Ａは、本開示の第一実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 5A is a diagram illustrating a method of manufacturing a double-walled container according to the first embodiment of the present disclosure; 図５Ｂは、本開示の第一実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 5B is a diagram illustrating a method of manufacturing a double-walled container according to the first embodiment of the present disclosure; 図５Ｃは、本開示の第一実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 5C is a diagram illustrating a method of manufacturing a double-walled container according to the first embodiment of the present disclosure; 図６は、本開示の第二実施形態に係る二重壁容器及び蓋部材の正面図である。Fig. 6 is a front view of a double-walled container and lid member according to a second embodiment of the present disclosure; 図７は、本開示の第二実施形態に係る二重壁容器及び蓋部材の断面図である。FIG. 7 is a cross-sectional view of a double-walled container and lid member according to a second embodiment of the present disclosure; 図８は、本開示の第二実施形態に係る二重壁容器の拡大断面図である。Fig. 8 is an enlarged cross-sectional view of a double-walled container according to a second embodiment of the present disclosure; 図９Ａは、本開示の第二実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 9A is a diagram illustrating a method of manufacturing a double-walled container according to a second embodiment of the present disclosure; 図９Ｂは、本開示の第二実施形態に係る二重壁容器の製造方法を説明する図である。9B is a diagram illustrating a method of manufacturing a double-walled container according to the second embodiment of the present disclosure; FIG. 図１０は、本開示の第二実施形態に係る反転装置の概略構成を説明する図である。FIG. 10 is a diagram illustrating a schematic configuration of a reversing device according to the second embodiment of the present disclosure; 本開示の第二実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 5 is a diagram illustrating a method of manufacturing a double-walled container according to a second embodiment of the present disclosure; 本開示の第二実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 5 is a diagram illustrating a method of manufacturing a double-walled container according to a second embodiment of the present disclosure; 本開示の第二実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 5 is a diagram illustrating a method of manufacturing a double-walled container according to a second embodiment of the present disclosure; 本開示の第三実施形態に係る二重壁容器及び蓋部材の正面図である。Fig. 10 is a front view of a double-walled container and lid member according to a third embodiment of the present disclosure; 本開示の第三実施形態に係る二重壁容器の部分断面図である。Fig. 10 is a partial cross-sectional view of a double-walled container according to a third embodiment of the present disclosure; 本開示の第三実施形態に係る二重壁容器の部分断面図である。Fig. 10 is a partial cross-sectional view of a double-walled container according to a third embodiment of the present disclosure; 本開示の第三実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 10 is a diagram illustrating a method of manufacturing a double-walled container according to the third embodiment of the present disclosure; 本開示の第三実施形態に係る二重壁容器の製造方法を説明する図である。FIG. 10 is a diagram illustrating a method of manufacturing a double-walled container according to the third embodiment of the present disclosure; 本発明の第三実施形態に係る中間成形体の形状を示す図である。FIG. 5 is a diagram showing the shape of an intermediate molded body according to a third embodiment of the present invention;

以下、実施形態の例について図面を参照して詳細に説明する。 Hereinafter, examples of embodiments will be described in detail with reference to the drawings.

＜第一実施形態＞
図１は、本開示の第一実施形態に係る二重壁容器を示す断面図である。図２は図１のＡ部を示す拡大断面図である。また図３Ａ及び図３Ｂは、本開示の第一実施形態に係る二重壁容器の製造方法を説明する図である。図４は、本開示の第一実施形態に係る反転装置の概略構成を説明する図である。また図５Ａ～図５Ｃは、本開示の第一実施形態に係る二重壁容器の製造方法を説明する図であり、特に、圧潰工程及び反転工程を説明する図である。<First embodiment>
1 is a cross-sectional view of a double-walled container according to a first embodiment of the present disclosure; FIG. FIG. 2 is an enlarged cross-sectional view showing part A in FIG. 3A and 3B are diagrams illustrating a method of manufacturing a double-walled container according to the first embodiment of the present disclosure. FIG. 4 is a diagram illustrating a schematic configuration of the reversing device according to the first embodiment of the present disclosure. 5A to 5C are diagrams explaining the manufacturing method of the double-walled container according to the first embodiment of the present disclosure, and in particular, are diagrams explaining the crushing process and the inverting process.

図１に示すように、本実施形態に係る二重壁容器（以下、単に容器ともいう）１０は、飲料等を収容するための凹部１１を有するカップ状の樹脂製容器である。容器１０は、容器１０の内面（凹部１１の内面）を形成する内壁部２０と、容器１０の外面を形成する外壁部３０と、の二重の壁部を備えている。内壁部２０と外壁部３０は、断熱効果を発揮するように、所定の間隔を空けて設けられている。 As shown in FIG. 1, a double-walled container (hereinafter also simply referred to as container) 10 according to the present embodiment is a cup-shaped resin container having a concave portion 11 for containing a beverage or the like. The container 10 has a double wall portion of an inner wall portion 20 forming the inner surface of the container 10 (the inner surface of the recess 11 ) and an outer wall portion 30 forming the outer surface of the container 10 . The inner wall portion 20 and the outer wall portion 30 are provided with a predetermined interval so as to exhibit a heat insulating effect.

なお、二重壁容器１０の材料は、特に限定されないが、例えば、ポリプロピレン（ＰＰ）やポリエチレン（ＰＥ）、ポリエチレンテレフタレート（ＰＥＴ）、生分解性プラスチック等の合成樹脂が好適に用いられる。 Although the material of the double-walled container 10 is not particularly limited, synthetic resins such as polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), and biodegradable plastics are preferably used.

内壁部２０は、容器１０の胴部の内周面を形成する内方胴部２１と、内方胴部２１から連続して設けられて容器１０の底部を形成する内方底部２２と、を有している。 The inner wall portion 20 includes an inner trunk portion 21 that forms the inner peripheral surface of the trunk portion of the container 10 and an inner bottom portion 22 that is provided continuously from the inner trunk portion 21 and forms the bottom portion of the container 10 . have.

一方、外壁部３０は、内壁部２０の上端から連続して設けられている。上述のように、外壁部３０と内壁部２０との間には隙間が形成されている。本実施形態では、外壁部３０は、容器１０の胴部の外周面を形成する外方胴部３１と、外方胴部３１から連続して設けられる単筒状の脚部３２と、を有している。すなわち外壁部３０は、その下端側が開口しており、この開口の縁部に短筒状の脚部３２が設けられている。 On the other hand, the outer wall portion 30 is provided continuously from the upper end of the inner wall portion 20 . As described above, a gap is formed between the outer wall portion 30 and the inner wall portion 20 . In this embodiment, the outer wall portion 30 has an outer trunk portion 31 that forms the outer peripheral surface of the trunk portion of the container 10 and a single tubular leg portion 32 that is continuously provided from the outer trunk portion 31 . are doing. That is, the outer wall portion 30 has an opening at its lower end side, and a short cylindrical leg portion 32 is provided at the edge of this opening.

二重壁容器１０を載置する場合には、この脚部３２が載置面に接触して開口が塞がれ、二重壁容器１０の底部（内方底部２２）と載置面との間にも空間が形成される。これにより、容器１０の断熱効果（保温効果および保冷効果）がさらに高められる。 When the double-walled container 10 is to be placed, the legs 32 come into contact with the placing surface to close the opening, and the bottom portion (the inner bottom portion 22) of the double-walled container 10 and the placing surface are separated. A space is formed between them. As a result, the heat insulation effect (thermal insulation effect and cold insulation effect) of the container 10 is further enhanced.

ここで、図２のＡ部拡大図に示すように、カップ状の容器１０の凹部１１の開口縁部（飲み口）には、内壁部２０と外壁部３０とを圧潰し、内壁部２０と外壁部３０との境界部分に折り目４０が付けられた圧潰部５０が、容器１０の周方向に亘って形成されている。 Here, as shown in the enlarged view of part A in FIG. A crushed portion 50 having a crease 40 at the boundary with the outer wall portion 30 is formed along the circumferential direction of the container 10 .

また本実施形態では、凹部１１の開口縁部には、内壁部２０及び外壁部３０が外方胴部３１の外側まで突出して設けられている。すなわち凹部１１の開口縁部には、外方胴部３１の外側に突出する環状フランジ部６０が設けられている。そしてこの環状フランジ部６０が、圧潰部５０によって構成されている。 Further, in this embodiment, the inner wall portion 20 and the outer wall portion 30 are provided at the opening edge portion of the recess 11 so as to protrude to the outside of the outer trunk portion 31 . That is, an annular flange portion 60 projecting outward from the outer trunk portion 31 is provided at the opening edge portion of the recess portion 11 . The annular flange portion 60 is configured by the crushing portion 50 .

圧潰部５０（環状フランジ部６０）を構成する内壁部２０と外壁部３０との隙間（最大値）ｄ１は、容器１０の周面を形成する内壁部２０（内方胴部２１）と外壁部３０（外方胴部３１）との隙間（最大値）ｄ２よりも狭くなっている。 The gap (maximum value) d1 between the inner wall portion 20 and the outer wall portion 30 forming the crushing portion 50 (annular flange portion 60) is equal to the inner wall portion 20 (inner trunk portion 21) forming the peripheral surface of the container 10 and the outer wall portion. It is narrower than the gap (maximum value) d2 with 30 (outer trunk portion 31).

このような圧潰部５０が凹部１１の開口縁部に設けられていることで、容器１０の強度が高められる。したがって、例えば、容器１０内に飲料等が収容された状態でも、容器１０の変形が抑制される。また本実施形態では、凹部１１の開口縁部に環状フランジ部６０が設けられ、この環状フランジ部６０が圧潰部５０で構成されているため、容器１０の強度がさらに高められる。 By providing such a crushing portion 50 at the opening edge of the recess 11, the strength of the container 10 is enhanced. Therefore, for example, deformation of the container 10 is suppressed even when the container 10 contains a beverage or the like. Further, in the present embodiment, the annular flange portion 60 is provided at the opening edge of the recess 11, and the annular flange portion 60 is composed of the crushed portion 50, so that the strength of the container 10 is further enhanced.

また圧潰部５０（環状フランジ部６０）を構成する内壁部２０の内方胴部２１との境界部分には、外壁部３０側を凸として湾曲する内湾曲部２５が形成されている。一方、圧潰部５０（環状フランジ部６０）を構成する外壁部３０の外方胴部３１との境界部分には、内壁部２０側を凸として湾曲する外湾曲部３５が形成されている。 In addition, an inner curved portion 25 that curves so as to protrude toward the outer wall portion 30 is formed at the boundary between the inner wall portion 20 and the inner trunk portion 21 of the inner wall portion 20 that constitutes the crushing portion 50 (annular flange portion 60). On the other hand, an outer curved portion 35 that curves convexly toward the inner wall portion 20 is formed at a boundary portion between the outer wall portion 30 that constitutes the crushing portion 50 (annular flange portion 60 ) and the outer trunk portion 31 .

そして、これら内湾曲部２５と外湾曲部３５との隙間ｄ３は、圧潰部５０の他の部分の隙間よりも狭くなっている。これにより、容器１０の強度がより確実に高められる。 A gap d3 between the inner curved portion 25 and the outer curved portion 35 is narrower than the gaps in other portions of the crushing portion 50. As shown in FIG. Thereby, the strength of the container 10 is increased more reliably.

このような形状の二重壁容器１０の製造方法は、特に限定されないが、二重壁容器１０は、例えば、以下に説明する方法で製造することができる。二重壁容器１０をこの方法で製造することで、二重壁容器１０の製造工程を簡略化することができ、製造効率の向上を図ることができる。 The method of manufacturing the double-walled container 10 having such a shape is not particularly limited, but the double-walled container 10 can be manufactured, for example, by the method described below. By manufacturing the double-walled container 10 by this method, the manufacturing process of the double-walled container 10 can be simplified, and the manufacturing efficiency can be improved.

具体的には、まずは射出成形装置によって所定プリフォームを射出成形した後、プリフォームをブロー成形装置によってブロー成形して中間成形体を形成する。 Specifically, first, a predetermined preform is injection-molded by an injection molding device, and then the preform is blow-molded by a blow molding device to form an intermediate molded body.

まずは図３Ａに示すように、所定形状のプリフォーム１００を射出成形によって形成する（射出成形工程）。プリフォーム１００は、ネック部１０１と、ネック部１０１から連続する有底の胴部１０２と、で構成されている。ネック部１０１は、二重壁容器１０の脚部３２となる部分である。したがって、ネック部１０１は、脚部３２と略同一形状（肉厚、高さ、開口径等）に形成されている。 First, as shown in FIG. 3A, a preform 100 having a predetermined shape is formed by injection molding (injection molding process). The preform 100 is composed of a neck portion 101 and a bottomed body portion 102 continuing from the neck portion 101 . The neck portion 101 is a portion that will become the leg portion 32 of the double-walled container 10 . Therefore, the neck portion 101 is formed to have substantially the same shape (thickness, height, opening diameter, etc.) as the leg portion 32 .

プリフォーム１００の胴部１０２の形状は、特に限定されないが、本実施形態では、比較的短小で略テーパー状（いわゆるお椀状）に形成されている。すなわちプリフォーム１００の胴部１０２は、ネック部１０１側の端部における直径が最も大きく、胴部１０２の底面部１０２ａ側ほど直径が小さくなるように形成されている。 The shape of the body portion 102 of the preform 100 is not particularly limited, but in the present embodiment, it is formed in a relatively short and substantially tapered shape (a so-called bowl shape). That is, the body portion 102 of the preform 100 has the largest diameter at the end portion on the neck portion 101 side, and is formed so that the diameter of the body portion 102 becomes smaller toward the bottom portion 102a side.

次に、プリフォーム１００を射出成形装置からブロー成形装置に搬送する。このプリフォーム１００の胴部１０２を金型内でブロー成形することにより、図３Ｂに示すように、所定形状の中間成形体２００を形成する（ブロー成形工程）。中間成形体２００は、容器１０の脚部３２となるネック部２０１と、容器１０の内壁部２０（内方胴部２１及び内方底部２２）となる内壁形成部２０２と、外壁部３０（外方胴部３１）となる外壁形成部２０３と、を備えている。なお中間成形体２００のネック部２０１は、プリフォーム１００のネック部１０１と共通する部分である。 The preform 100 is then transported from the injection molding machine to the blow molding machine. By blow-molding the body portion 102 of the preform 100 in a mold, an intermediate molded body 200 having a predetermined shape is formed as shown in FIG. 3B (blow molding step). The intermediate molded body 200 includes a neck portion 201 that serves as the leg portion 32 of the container 10, an inner wall forming portion 202 that serves as the inner wall portion 20 (the inner body portion 21 and the inner bottom portion 22) of the container 10, and an outer wall portion 30 (the outer wall portion 202). and an outer wall forming portion 203 that becomes the square body portion 31). The neck portion 201 of the intermediate molded body 200 is a portion common to the neck portion 101 of the preform 100 .

外壁形成部２０３はネック部２０１から連続して形成され、内壁形成部２０２は外壁形成部２０３のネック部２０１とは反対側に連続して形成されている。すなわち内壁形成部２０２は、外壁形成部２０３の深さ方向（図３Ａ及び図３Ｂ中の左右方向）の外側に膨出した形状に形成されている。つまり中間成形体２００は、容器１０の内壁部２０が外壁部３０の脚部３２とは反対側の外側に反転した形状となっている。 The outer wall forming portion 203 is formed continuously from the neck portion 201 , and the inner wall forming portion 202 is formed continuously on the opposite side of the outer wall forming portion 203 from the neck portion 201 . That is, the inner wall forming portion 202 is formed in a shape that bulges outward in the depth direction of the outer wall forming portion 203 (horizontal direction in FIGS. 3A and 3B). That is, the intermediate molded body 200 has a shape in which the inner wall portion 20 of the container 10 is inverted outward on the side opposite to the leg portion 32 of the outer wall portion 30 .

また本実施形態では、内壁形成部２０２と外壁形成部２０３との境界部分（容器１０の凹部１１の開口縁部に相当する部分）には、外壁形成部２０３の径方向の外側に突出する突出部２０４が、周方向に亘って設けられている。つまり、この突出部２０４を介して内壁形成部２０２と外壁形成部２０３とが接続されている。突出部２０４は、容器１０の圧潰部５０（環状フランジ部６０）となる部分である。したがって、突出部２０４は、圧潰部５０（環状フランジ部６０）に合わせた形状（突出量）に形成されている。 Further, in the present embodiment, the boundary portion between the inner wall forming portion 202 and the outer wall forming portion 203 (the portion corresponding to the opening edge portion of the concave portion 11 of the container 10) has a protrusion that protrudes radially outward from the outer wall forming portion 203. A portion 204 is provided along the circumferential direction. In other words, the inner wall forming portion 202 and the outer wall forming portion 203 are connected via the projecting portion 204 . The projecting portion 204 is a portion that becomes the crushing portion 50 (annular flange portion 60 ) of the container 10 . Therefore, the protruding portion 204 is formed in a shape (amount of protrusion) that matches the crushing portion 50 (annular flange portion 60).

さらに、突出部２０４の内壁形成部２０２との境界部分には、容器１０の内湾曲部２５となる第１の湾曲部２０５が形成されている。突出部２０４の外壁形成部２０３との境界部分には容器１０の外湾曲部３５となる第２の湾曲部２０６が形成されている。これら第１の湾曲部２０５及び第２の湾曲部２０６は、中間成形体２００の内側を凸とする曲面に形成されている。 Furthermore, a first curved portion 205 that becomes the inner curved portion 25 of the container 10 is formed at the boundary portion between the projecting portion 204 and the inner wall forming portion 202 . A second curved portion 206 that serves as the outer curved portion 35 of the container 10 is formed at the boundary between the projecting portion 204 and the outer wall forming portion 203 . The first curved portion 205 and the second curved portion 206 are formed into curved surfaces that are convex toward the inner side of the intermediate molded body 200 .

このような中間成形体２００を形成した後は、中間成形体２００をブロー成形装置から反転装置に搬送し、反転装置によって内壁形成部２０２を押圧して反転させることによって、最終製品である二重壁容器１０を形成する（反転工程）。 After forming such an intermediate molded body 200, the intermediate molded body 200 is conveyed from the blow molding device to the reversing device, and the inner wall forming part 202 is pressed and reversed by the reversing device, thereby forming a double layered product as a final product. A wall container 10 is formed (reversal step).

ここで、図４に示すように、本実施形態に係る反転装置３００は、収容金型３１０と、環状押圧金型３２０と、凸状押圧金型３３０と、を備えている。収容金型３１０は、収容凹部３１１を備えている。収容凹部３１１は、収容金型３１０の一方の端面に開口して設けられている。収容凹部３１１には、中間成形体２００の外壁形成部２０３及びネック部２０１が収容される。 Here, as shown in FIG. 4 , the reversing device 300 according to this embodiment includes a housing mold 310 , an annular pressing mold 320 and a convex pressing mold 330 . The housing mold 310 has a housing recess 311 . The accommodation recess 311 is provided to open on one end surface of the accommodation mold 310 . The outer wall forming portion 203 and the neck portion 201 of the intermediate molded body 200 are accommodated in the accommodation recess 311 .

環状押圧金型３２０は、後述するように収容金型３１０との間で中間成形体２００の突出部２０４を圧潰するためのものである。環状押圧金型３２０は、収容凹部３１１の開口周縁部に対向して環状に設けられている。また環状押圧金型３２０の収容凹部３１１に対向する部分には貫通孔３２１が形成されている。そして環状押圧金型３２０は、中間成形体２００の深さ方向（図４中の左右方向）で、移動可能に構成されている。すなわち環状押圧金型３２０は、収容金型３１０に対して離接する方向に移動可能に構成されている。 The annular pressing mold 320 is for crushing the protruding portion 204 of the intermediate compact 200 between itself and the housing mold 310 as will be described later. The annular pressing mold 320 is annularly provided so as to face the peripheral edge of the opening of the housing recess 311 . A through hole 321 is formed in a portion of the annular pressing mold 320 that faces the accommodation recess 311 . The annular pressing mold 320 is configured to be movable in the depth direction of the intermediate compact 200 (horizontal direction in FIG. 4). That is, the ring-shaped pressing mold 320 is configured to be movable in the directions of separating and contacting with respect to the housing mold 310 .

凸状押圧金型３３０は、内壁形成部２０２を押圧して反転させるためのものである。言い換えれば、凸状押圧金型３３０は、容器１０の凹部１１を形成するための金型である。この凸状押圧金型３３０は、環状押圧金型３２０と同様に、中間成形体２００の深さ方向（図４中の左右方向）で、移動可能に構成されている。より詳しくは、凸状押圧金型３３０は、環状押圧金型３２０の貫通孔３２１を通過して、収容凹部３１１内に挿入可能に構成されている。 The convex pressing mold 330 is for pressing and inverting the inner wall forming portion 202 . In other words, the convex pressing mold 330 is a mold for forming the recess 11 of the container 10 . Like the annular pressing die 320, the convex pressing die 330 is configured to be movable in the depth direction of the intermediate compact 200 (horizontal direction in FIG. 4). More specifically, the convex press die 330 is configured to pass through the through hole 321 of the annular press die 320 and be inserted into the housing recess 311 .

また本実施形態では、凸状押圧金型３３０は、後述するように環状押圧金型３２０と収容金型３１０とによって突出部２０４が圧潰された状態で、中間成形体２００の深さ方向（図４中の左右方向）で、移動可能に構成されている。 Further, in this embodiment, the convex pressing mold 330 is arranged in a state in which the protruding portion 204 is crushed by the annular pressing mold 320 and the housing mold 310 as will be described later. 4), and is configured to be movable.

本実施形態では、このような構成の反転装置３００によって中間成形体２００の内壁形成部２０２を反転させることで、最終製品である二重壁容器１０を形成する。 In this embodiment, the double-walled container 10, which is the final product, is formed by inverting the inner wall forming portion 202 of the intermediate molded body 200 by the inverting device 300 having such a configuration.

まずは図５Ａに示すように、収容金型３１０の収容凹部３１１内に中間成形体２００の外壁形成部２０３及びネック部２０１を収容する。このとき、突出部２０４は、収容金型３１０の開口周縁の端面３１０ａ上に突出した状態となる。 First, as shown in FIG. 5A , the outer wall forming portion 203 and the neck portion 201 of the intermediate compact 200 are accommodated in the accommodating recess 311 of the accommodating mold 310 . At this time, the protruding portion 204 protrudes above the end surface 310 a of the opening peripheral edge of the housing mold 310 .

この状態で、図５Ｂに示すように、環状押圧金型３２０を収容金型３１０側に移動させ、環状押圧金型３２０と収容金型３１０とで中間成形体２００の突出部２０４を圧潰する（圧潰工程）。 In this state, as shown in FIG. 5B, the annular pressing mold 320 is moved toward the housing mold 310, and the annular pressing mold 320 and the housing mold 310 crush the projecting portion 204 of the intermediate compact 200 ( crushing process).

これにより、容器１０の圧潰部５０（環状フランジ部６０）が形成される。また上述のように突出部２０４に第１の湾曲部２０５及び第２の湾曲部２０６が形成されていることで、圧潰部５０を構成する内壁部２０と外壁部３０との隙間を比較的狭くすることができる。 Thereby, the crushed portion 50 (annular flange portion 60) of the container 10 is formed. In addition, since the first curved portion 205 and the second curved portion 206 are formed in the projecting portion 204 as described above, the gap between the inner wall portion 20 and the outer wall portion 30 constituting the crushing portion 50 is relatively narrow. can do.

その際、突出部２０４は所定温度（１００℃～１４０℃）に加熱された状態で圧潰されることが好ましい。すなわち、反転装置３００は、中間成形体２００の突出部２０４を所定温度に調整する温調装置を備えていることが好ましい。 At that time, it is preferable that the projecting portion 204 is crushed while being heated to a predetermined temperature (100° C. to 140° C.). That is, the reversing device 300 preferably includes a temperature control device that adjusts the protrusion 204 of the intermediate molded body 200 to a predetermined temperature.

例えば、環状押圧金型３２０には、温水や油等の温調媒体が供給される供給路（図示なし）が形成されており、この供給路内に供給装置（温調装置）によって温調媒体を供給することで、環状押圧金型３２０の温度（表面温度）を調整することができるようになっている。 For example, the annular pressing mold 320 is formed with a supply path (not shown) through which a temperature control medium such as hot water or oil is supplied. is supplied, the temperature (surface temperature) of the annular pressing die 320 can be adjusted.

そして、表面温度が調整された環状押圧金型３２０を突出部２０４に接触させ、突出部２０４を所定温度まで上昇させた状態で、環状押圧金型３２０と収容金型３１０とで圧潰する。 Then, the ring-shaped pressing die 320 whose surface temperature is adjusted is brought into contact with the projecting portion 204 , and the ring-shaped pressing die 320 and the housing die 310 crush the projecting portion 204 while raising the temperature to a predetermined temperature.

なお温調装置の構成は、特に限定されず、例えば、環状押圧金型３２０を加熱するヒータであってもよいし、突出部２０４自体を加熱するヒータであってもよい。 The configuration of the temperature control device is not particularly limited, and may be, for example, a heater that heats the annular pressing mold 320 or a heater that heats the projecting portion 204 itself.

次に、環状押圧金型３２０と収容金型３１０とで突出部２０４を圧潰した状態を保持したまま、図５Ｃに示すように、凸状押圧金型３３０を収容金型３１０側に移動させ、内壁形成部２０２を収容凹部３１１内に押し込んで反転させる。つまり内壁形成部２０２を外壁形成部２０３の内側に押し込んで反転させる（反転工程）。 Next, as shown in FIG. 5C, while maintaining the state in which the projecting portion 204 is crushed by the annular pressing mold 320 and the housing mold 310, the convex pressing mold 330 is moved toward the housing mold 310, The inner wall forming portion 202 is pushed into the housing recess 311 and turned over. That is, the inner wall forming portion 202 is pushed into the outer wall forming portion 203 and turned over (reversing step).

具体的には、凸状押圧金型３３０を収容金型３１０側に移動させると、凸状押圧金型３３０の先端面が内壁形成部２０２の底部２０２ａに当接する。底部２０２ａが押圧されることで、内壁形成部２０２の胴部２０２ｂが変形（反転）し、外壁形成部２０３の内側に押し込まれる。これにより、二重壁容器１０が形成される（図１参照）。 Specifically, when the convex pressing die 330 is moved toward the housing die 310 , the tip surface of the convex pressing die 330 comes into contact with the bottom portion 202 a of the inner wall forming portion 202 . By pressing the bottom portion 202 a , the trunk portion 202 b of the inner wall forming portion 202 is deformed (inverted) and pushed inside the outer wall forming portion 203 . This forms a double-walled container 10 (see FIG. 1).

なお、凸状押圧金型３３０によって内壁形成部２０２を反転させる際、内壁形成部２０２を所定温度に調整するようにしてもよい。例えば、反転装置３００が、内壁形成部２０２を加熱するヒータ等の温調装置を備えるようにしてもよい。ただし、内壁形成部２０２を加熱する場合、内壁形成部２０２の胴部２０２ｂを加熱し、凸状押圧金型３３０が当接する底部２０２ａは極力加熱しないことが好ましい。これにより、凸状押圧金型３３０によって内壁形成部２０２を適切に押圧でき、内壁形成部２０２を良好に反転させることができる。 When the inner wall forming portion 202 is reversed by the convex pressing mold 330, the inner wall forming portion 202 may be adjusted to a predetermined temperature. For example, the reversing device 300 may include a temperature control device such as a heater for heating the inner wall forming portion 202 . However, when heating the inner wall forming portion 202, it is preferable to heat the trunk portion 202b of the inner wall forming portion 202 and not heat the bottom portion 202a with which the convex pressing mold 330 abuts as much as possible. As a result, the inner wall forming portion 202 can be appropriately pressed by the convex pressing mold 330, and the inner wall forming portion 202 can be satisfactorily inverted.

このような本実施形態の製造方法により二重壁容器１０を製造することで、つまり反転装置３００によって中間成形体２００を反転させて二重壁容器１０を製造することで、二重壁容器１０の製造工程を簡略化することができる。したがって、二重壁容器１０の製造効率を向上することができる。 By manufacturing the double-walled container 10 by the manufacturing method of this embodiment, that is, by manufacturing the double-walled container 10 by turning over the intermediate molded body 200 with the turning device 300, the double-walled container 10 manufacturing process can be simplified. Therefore, the manufacturing efficiency of the double-walled container 10 can be improved.

また、上記製造方法では、二重壁容器１０の脚部３２は射出成形によって形成され、その他の部分はブロー成形によって形成されている。したがって、脚部３２は、その他の部分に比べて肉厚に形成されている。これにより、二重壁容器１０を載置した際の安定性を向上することができる。 Further, in the manufacturing method described above, the legs 32 of the double-walled container 10 are formed by injection molding, and the other portions are formed by blow molding. Therefore, the leg portion 32 is formed thicker than the other portions. This can improve the stability when the double-walled container 10 is placed.

また例えば、上述の実施形態では、反転工程を、中間成形体２００の突出部２０４を圧潰した状態で実施したが、突出部２０４の圧潰を解除した状態で実施してもよい。つまり突出部２０４が十分に圧潰されていれば、反転工程を実施する際に、必ずしも突出部２０４は圧潰された状態でなくてもよい。 Further, for example, in the above-described embodiment, the reversing step is performed with the projecting portion 204 of the intermediate molded body 200 crushed, but it may be performed with the projecting portion 204 released from crushing. In other words, as long as the protruding portion 204 is sufficiently crushed, the protruding portion 204 does not necessarily have to be in a crushed state when the reversing step is performed.

＜第二実施形態＞
図６及び図７は、本開示の第二実施形態に係る二重壁容器及び蓋部材を示す図である。図６は二重壁容器から蓋部材を外した状態の正面図である。また図７は、二重壁容器に蓋部材を装着した状態の図である。図６のＡ１－Ａ１線に対応する部分の断面図である。図８は、図７のＡ１部を示す拡大断面図である。また図９Ａ及び図９Ｂは、本開示の第二実施形態に係る二重壁容器の製造方法を説明する図である。図１０は、本開示の第二実施形態に係る反転装置の概略構成を説明する図である。図１１Ａ～図１１Ｃは、本開示の第二実施形態に係る二重壁容器の製造方法を説明する図であり、特に、圧潰工程及び反転工程を説明する図である。<Second embodiment>
Figures 6 and 7 illustrate a double-walled container and lid member according to a second embodiment of the present disclosure. FIG. 6 is a front view of the double-walled container with the lid removed. FIG. 7 is a diagram of a state in which the lid member is attached to the double-walled container. FIG. 7 is a cross-sectional view of a portion corresponding to line A1-A1 in FIG. 6; FIG. 8 is an enlarged cross-sectional view showing part A1 in FIG. 9A and 9B are diagrams illustrating a method of manufacturing a double-walled container according to the second embodiment of the present disclosure. FIG. 10 is a diagram illustrating a schematic configuration of a reversing device according to the second embodiment of the present disclosure; 11A-11C are diagrams illustrating a method of manufacturing a double-walled container according to a second embodiment of the present disclosure, and in particular, diagrams illustrating the crushing and inverting steps.

図６及び図７に示すように、本実施形態に係る二重壁容器（以下、単に容器ともいう）１１０は、飲料等を収容するための凹部１１１を有するカップ状の樹脂製容器である。容器１１０は、一端側が開口する容器１１０の内面（凹部１１１の内面）を形成する内壁部１２０と、容器１１０の外面を形成する外壁部１３０と、を備えている。つまり、容器１１０は二重の壁部を備えている。内壁部１２０と外壁部１３０は、断熱効果を発揮するように、所定の間隔を空けて設けられている。 As shown in FIGS. 6 and 7, a double-walled container (hereinafter also simply referred to as a container) 110 according to this embodiment is a cup-shaped resin container having a concave portion 111 for containing a beverage or the like. The container 110 includes an inner wall portion 120 forming the inner surface of the container 110 (the inner surface of the recess 111 ) with one end open, and an outer wall portion 130 forming the outer surface of the container 110 . Thus, container 110 has a double wall. The inner wall portion 120 and the outer wall portion 130 are provided with a predetermined gap therebetween so as to exhibit a heat insulating effect.

二重壁容器１１０の材料は、第一実施形態に係る二重壁容器１０の材料と同様の材料であってもよい。 The material of the double-walled container 110 may be similar to the material of the double-walled container 10 according to the first embodiment.

内壁部１２０は、容器１１０の凹部１１１の内周面を形成する内方胴部１２１と、内方胴部１２１から連続して設けられて容器１１０の底部を形成する内方底部１２２と、を有している。 The inner wall portion 120 includes an inner trunk portion 121 that forms the inner peripheral surface of the recessed portion 111 of the container 110 and an inner bottom portion 122 that is provided continuously from the inner trunk portion 121 and forms the bottom portion of the container 110 . have.

一方、外壁部１３０は、内壁部１２０の上端から連続して設けられている。上述のように、外壁部１３０と内壁部１２０との間には隙間が形成されている。本実施形態では、外壁部１３０は、容器１１０の胴部の外周面を形成する外方胴部１３１と、外方胴部１３１から連続して設けられる単筒状の脚部１３２と、を有している。すなわち外壁部１３０は、その下端側が開口しており、この開口の周縁部に短筒状の脚部１３２が設けられている。 On the other hand, the outer wall portion 130 is provided continuously from the upper end of the inner wall portion 120 . As described above, a gap is formed between the outer wall portion 130 and the inner wall portion 120 . In this embodiment, the outer wall portion 130 has an outer trunk portion 131 that forms the outer peripheral surface of the trunk portion of the container 110 and a single tubular leg portion 132 that is continuously provided from the outer trunk portion 131 . are doing. That is, the outer wall portion 130 has an opening at its lower end side, and a short cylindrical leg portion 132 is provided on the peripheral edge portion of this opening.

二重壁容器１１０を載置する場合には、この脚部１３２が載置面に接触して開口が塞がれ、二重壁容器１１０の底部（内方底部１２２）と載置面との間にも空間が形成される。これにより、容器１１０の断熱効果（保温効果および保冷効果）がさらに高められる。 When the double-walled container 110 is to be placed, the legs 132 come into contact with the placing surface to block the opening, and the bottom portion (inner bottom portion 122) of the double-walled container 110 and the placing surface are separated. A space is formed between them. This further enhances the heat insulation effect (thermal insulation effect and cold insulation effect) of the container 110 .

また二重壁容器１１０は、凹部１１１の開口１１１ａを覆う蓋部材１９０を装着可能に構成されている。本実施形態では、二重壁容器１１０の内周面側が、蓋部材１９０を装着可能に構成されている。具体的には、内壁部１２０の内方胴部１２１には、その開口１１１ａ側の端部に、蓋部材１９０が装着される装着部１２３が設けられている。装着部１２３は、二重壁容器１１０に装着する際に、蓋部材１９０が摺接する部分である。装着部１２３は、容器１１０の上下方向で略平面に形成されている。また装着部１２３には、蓋部材１９０を容器１１０に固定するための複数（例えば、６つ）の係合溝１２４が周方向に所定の間隔で形成されている。 Also, the double-walled container 110 is configured such that a lid member 190 that covers the opening 111a of the recess 111 can be attached. In this embodiment, the inner peripheral surface side of the double-walled container 110 is configured so that the lid member 190 can be attached. Specifically, the inner trunk portion 121 of the inner wall portion 120 is provided with a mounting portion 123 to which the lid member 190 is mounted at the end portion on the side of the opening 111a. The mounting portion 123 is a portion with which the lid member 190 slides when the double-walled container 110 is mounted. The mounting portion 123 is formed substantially flat in the vertical direction of the container 110 . A plurality of (for example, six) engaging grooves 124 for fixing the lid member 190 to the container 110 are formed in the mounting portion 123 at predetermined intervals in the circumferential direction.

蓋部材１９０は、二重壁容器１１０の凹部１１１内に装着される、いわゆる内蓋である。蓋部材１９０は、開口１１１ａに対向する蓋部本体１９１と、蓋部本体１９１の外周部に設けられて装着部１２３に対向する環状の縦壁部１９２と、を備えている。この縦壁部１９２には、各係合溝１２４側に突出する複数の係合凸部１９３が設けられている。これら複数の係合凸部１９３が係合溝１２４に係合されることで、蓋部材１９０が容器１１０に固定されるようになっている。 The lid member 190 is a so-called inner lid mounted inside the recess 111 of the double-walled container 110 . The lid member 190 includes a lid main body 191 facing the opening 111 a and an annular vertical wall portion 192 provided on the outer peripheral portion of the lid main body 191 and facing the mounting portion 123 . The vertical wall portion 192 is provided with a plurality of engaging projections 193 projecting toward the engaging grooves 124 . The lid member 190 is fixed to the container 110 by engaging the engaging grooves 124 with the plurality of engaging protrusions 193 .

さらに二重壁容器１１０には、内壁部１２０と外壁部１３０との境界部分に、装着部１２３を補強するための補強部１５０が、周方向に沿って設けられている。本実施形態では、凹部１１１の開口１１１ａの周縁部（飲み口）に、内壁部１２０及び外壁部１３０が外方胴部１３１よりも外側に突出した環状フランジ部１６０が設けられている。この環状フランジ部１６０が補強部１５０として機能する。 Further, in the double-walled container 110, a reinforcing portion 150 for reinforcing the mounting portion 123 is provided in the boundary portion between the inner wall portion 120 and the outer wall portion 130 along the circumferential direction. In this embodiment, an annular flange portion 160 in which the inner wall portion 120 and the outer wall portion 130 protrude outward from the outer trunk portion 131 is provided at the peripheral portion (drinking mouth) of the opening 111 a of the recess portion 111 . This annular flange portion 160 functions as the reinforcing portion 150 .

ここで、環状フランジ部１６０は、内壁部１２０と外壁部１３０とを圧潰し、内壁部１２０と外壁部１３０との境界部分に折り目を付けることによって形成されている。そして図８に示すように、環状フランジ部１６０を構成する内壁部１２０と外壁部１３０との隙間（最大値）ｄ１１は、装着部１２３を形成する内壁部１２０（内方胴部１２１）と外壁部１３０（外方胴部１３１）との隙間（最大値）ｄ１２よりも狭くなっている。 Here, the annular flange portion 160 is formed by crushing the inner wall portion 120 and the outer wall portion 130 and forming a crease at the boundary portion between the inner wall portion 120 and the outer wall portion 130 . As shown in FIG. 8, the gap (maximum value) d11 between the inner wall portion 120 and the outer wall portion 130 forming the annular flange portion 160 is the same as the inner wall portion 120 (inner trunk portion 121) forming the mounting portion 123 and the outer wall portion 120. It is narrower than the gap (maximum value) d12 with the portion 130 (outer trunk portion 131).

このような環状フランジ部１６０からなる補強部１５０が開口１１１ａの周縁部に設けられていることで、容器１１０の強度、特に、装着部１２３付近の強度が高められている。したがって、装着部１２３に複数の係合溝１２４が形成されていても、開口１１１ａの周縁部を含む装着部１２３付近の強度が十分に確保される。したがって、例えば、容器１１０内に飲料等が収容された状態で容器１１０が把持されても、容器１１０の変形が抑制される。 The strength of the container 110, particularly the strength of the mounting portion 123 in particular, is increased by providing the reinforcing portion 150 composed of such an annular flange portion 160 at the peripheral portion of the opening 111a. Therefore, even if a plurality of engaging grooves 124 are formed in the mounting portion 123, sufficient strength is ensured in the vicinity of the mounting portion 123 including the peripheral portion of the opening 111a. Therefore, for example, even if the container 110 is gripped while a beverage or the like is contained in the container 110, the deformation of the container 110 is suppressed.

また本実施形態では、補強部１５０を構成する環状フランジ部１６０が、内壁部１２０と外壁部１３０とを圧潰することによって形成されていることで、容器１１０の強度がより高められている。 Further, in this embodiment, the strength of the container 110 is further increased by forming the annular flange portion 160 that constitutes the reinforcing portion 150 by crushing the inner wall portion 120 and the outer wall portion 130 .

さらに、環状フランジ部１６０を構成する内壁部１２０の内方胴部１２１との境界部分には、外壁部１３０側を凸として湾曲する内湾曲部１２５が形成されている。一方、環状フランジ部１６０を構成する外壁部１３０の外方胴部１３１との境界部分には、内壁部１２０側を凸として湾曲する外湾曲部１３５が形成されている。 Further, an inner curved portion 125 is formed in a boundary portion between the inner wall portion 120 constituting the annular flange portion 160 and the inner trunk portion 121 so as to be convex toward the outer wall portion 130 side. On the other hand, at the boundary between the outer wall portion 130 and the outer trunk portion 131 of the outer wall portion 130 that constitutes the annular flange portion 160, an outer curved portion 135 is formed that curves so as to project toward the inner wall portion 120 side.

そして、これら内湾曲部１２５と外湾曲部１３５との隙間ｄ１３は、環状フランジ部１６０の他の部分の隙間よりも狭くなっている。これにより、容器１１０の強度がより高められている。 A gap d<b>13 between the inner curved portion 125 and the outer curved portion 135 is narrower than the gaps in other portions of the annular flange portion 160 . This further increases the strength of the container 110 .

このような形状の二重壁容器１１０の製造方法は、第一実施形態に係る二重壁容器１０の製造方法と同様の製造方法であってもよい。つまり、例えば、以下に説明する方法で製造することができる。 The method for manufacturing the double-walled container 110 having such a shape may be the same as the method for manufacturing the double-walled container 10 according to the first embodiment. That is, for example, it can be manufactured by the method described below.

具体的には、まずは射出成形装置によって所定プリフォームを射出成形した後、プリフォームをブロー成形して中間成形体を形成する。 Specifically, first, a predetermined preform is injection-molded by an injection molding machine, and then the preform is blow-molded to form an intermediate molded body.

図９Ａに示すように、まずは所定形状のプリフォーム１１００を射出成形によって形成する（射出成形工程）。プリフォーム１１００は、ネック部１１０１と、ネック部１１０１から連続する有底の胴部１１０２とで構成されている。ネック部１１０１は、二重壁容器１１０の脚部１３２となる部分である。したがって、ネック部１１０１は、脚部１３２と略同一形状（肉厚、高さ、開口径等）に形成されている。 As shown in FIG. 9A, first, a preform 1100 having a predetermined shape is formed by injection molding (injection molding process). The preform 1100 is composed of a neck portion 1101 and a bottomed body portion 1102 continuing from the neck portion 1101 . The neck portion 1101 is a portion that becomes the leg portion 132 of the double-walled container 110 . Therefore, the neck portion 1101 is formed to have substantially the same shape (thickness, height, opening diameter, etc.) as the leg portion 132 .

プリフォーム１１００の胴部１１０２の形状は、特に限定されないが、本実施形態では、比較的短小で略テーパー状（いわゆるお椀状）に形成されている。すなわちプリフォーム１１００の胴部１１０２は、ネック部１１０１側の端部における直径が最も大きく、胴部１１０２の底面部１１０２ａ側ほど直径が小さくなるように形成されている。 The shape of the body portion 1102 of the preform 1100 is not particularly limited, but in the present embodiment, it is formed in a relatively short and substantially tapered shape (a so-called bowl shape). That is, the body portion 1102 of the preform 1100 has the largest diameter at the end on the neck portion 1101 side, and is formed so that the diameter of the body portion 1102 decreases toward the bottom surface portion 1102a.

次に、プリフォーム１００を射出成形装置からブロー成形装置に搬送する。このプリフォーム１１００の胴部１１０２を金型内でブロー成形することにより、図９Ｂに示すように、所定形状の中間成形体１２００を形成する（ブロー成形工程）。中間成形体１２００は、容器１１０の脚部１３２となるネック部１２０１と、容器１１０の内壁部１２０（内方胴部１２１及び内方底部１２２）となる内壁形成部１２０２と、外壁部１３０（外方胴部１３１）となる外壁形成部１２０３と、を備えている。なお中間成形体１２００のネック部１２０１は、プリフォーム１１００のネック部１１０１と共通する部分である。 The preform 100 is then transported from the injection molding machine to the blow molding machine. By blow-molding the body portion 1102 of the preform 1100 in a mold, an intermediate molded body 1200 having a predetermined shape is formed as shown in FIG. 9B (blow molding step). The intermediate molded body 1200 includes a neck portion 1201 that serves as the leg portion 132 of the container 110, an inner wall forming portion 1202 that serves as the inner wall portion 120 (the inner body portion 121 and the inner bottom portion 122) of the container 110, and an outer wall portion 130 (the outer wall portion 120). and an outer wall forming portion 1203 that becomes the square body portion 131). The neck portion 1201 of the intermediate molded body 1200 is a common portion with the neck portion 1101 of the preform 1100 .

外壁形成部１２０３はネック部１２０１から連続して形成され、内壁形成部１２０２は外壁形成部１２０３のネック部１２０１とは反対側に連続して形成されている。すなわち内壁形成部１２０２は、外壁形成部１２０３の深さ方向（図９Ａ及び図９Ｂ中の左右方向）の外側に膨出した形状に形成されている。つまり中間成形体１２００は、容器１１０の内壁部１２０が外壁部１３０の脚部１３２とは反対側の外側に反転した形状となっている。 The outer wall forming portion 1203 is formed continuously from the neck portion 1201 , and the inner wall forming portion 1202 is formed continuously on the opposite side of the outer wall forming portion 1203 from the neck portion 1201 . That is, the inner wall forming portion 1202 is formed in a shape that bulges outward in the depth direction of the outer wall forming portion 1203 (horizontal direction in FIGS. 9A and 9B). That is, the intermediate molded body 1200 has a shape in which the inner wall portion 120 of the container 110 is inverted outward on the side opposite to the leg portion 132 of the outer wall portion 130 .

ここで、内壁形成部１２０２には、装着部１２３の係合溝１２４となる部分に、内壁形成部１２０２の径方向外側に突出する凸部１２０４が形成されている。すなわち、凸部１２０４は、容器１１０の係合溝１２４が内壁形成部１２０２の径方向外側に反転した形状を有する。 Here, the inner wall forming portion 1202 is formed with a convex portion 1204 protruding radially outward of the inner wall forming portion 1202 at a portion of the mounting portion 123 that becomes the engaging groove 124 . That is, the convex portion 1204 has a shape in which the engagement groove 124 of the container 110 is reversed radially outward of the inner wall forming portion 1202 .

また本実施形態では、内壁形成部１２０２と外壁形成部１２０３との境界部分（開口１１１ａの周縁部に相当する部分）には、外壁形成部１２０３の径方向の外側に突出する突出部１２０５が、周方向に亘って設けられている。つまり、この突出部１２０５を介して内壁形成部１２０２と外壁形成部１２０３とが接続されている。突出部１２０５は、容器１１０の環状フランジ部１６０（補強部１５０）となる部分である。したがって、突出部１２０５は、環状フランジ部１６０に合わせた形状（突出量）に形成されている。 Further, in the present embodiment, at the boundary portion between the inner wall forming portion 1202 and the outer wall forming portion 1203 (the portion corresponding to the peripheral portion of the opening 111a), a protruding portion 1205 protruding radially outward from the outer wall forming portion 1203 is provided. It is provided along the circumferential direction. In other words, the inner wall forming portion 1202 and the outer wall forming portion 1203 are connected via the projecting portion 1205 . The projecting portion 1205 is a portion that becomes the annular flange portion 160 (reinforcing portion 150 ) of the container 110 . Therefore, the protruding portion 1205 is formed in a shape (amount of protrusion) that matches the annular flange portion 160 .

さらに、突出部１２０５と内壁形成部１２０２との境界部分には、容器１１０の内湾曲部１２５となる第１の湾曲部１２０６が形成されている。突出部１２０５と外壁形成部１２０３との境界部分には容器１１０の外湾曲部１３５となる第２の湾曲部１２０７が形成されている。これら第１の湾曲部１２０６及び第２の湾曲部１２０７は、中間成形体１２００の内側を凸とする曲面に形成されている。 Furthermore, a first curved portion 1206 that becomes the inner curved portion 125 of the container 110 is formed at the boundary portion between the projecting portion 1205 and the inner wall forming portion 1202 . A second curved portion 1207 that serves as the outer curved portion 135 of the container 110 is formed at the boundary between the projecting portion 1205 and the outer wall forming portion 1203 . These first curved portion 1206 and second curved portion 1207 are formed into curved surfaces that are convex toward the inner side of the intermediate molded body 1200 .

このような中間成形体１２００を形成した後は、中間成形体１２００をブロー成形装置から反転装置に搬送し、反転装置によって内壁形成部１２０２を押圧して反転させることによって、最終製品である二重壁容器１１０を形成する（反転工程）。 After forming such an intermediate molded body 1200, the intermediate molded body 1200 is conveyed from the blow molding device to the reversing device, and the inner wall forming part 1202 is pressed and reversed by the reversing device, thereby forming the final double layered product. A wall container 110 is formed (reversal step).

ここで、図１０に示すように、本実施形態に係る反転装置１３００は、収容金型１３１０と、環状押圧金型１３２０と、凸状押圧金型１３３０と、を備えている。収容金型１３１０は、収容凹部１３１１を備えている。収容凹部１３１１は、収容金型１３１０の一方の端面に開口して設けられている。収容凹部１３１１には、中間成形体１２００の外壁形成部１２０３及びネック部１２０１が収容される。 Here, as shown in FIG. 10 , the reversing device 1300 according to this embodiment includes a housing mold 1310 , an annular pressing mold 1320 and a convex pressing mold 1330 . The housing mold 1310 has a housing recess 1311 . The accommodation recess 1311 is provided to open on one end surface of the accommodation mold 1310 . The outer wall forming portion 1203 and the neck portion 1201 of the intermediate molded body 1200 are accommodated in the accommodating recess 1311 .

環状押圧金型１３２０は、後述するように収容金型１３１０との間で中間成形体１２００の突出部１２０５を圧潰するためのものである。環状押圧金型１３２０は、収容凹部１３１１の開口縁部に対向して環状に設けられている。また環状押圧金型１３２０の収容凹部１３１１に対向する部分には貫通孔１３２１が形成されている。そして環状押圧金型１３２０は、中間成形体１２００の深さ方向（図１０中の左右方向）で、移動可能に構成されている。すなわち環状押圧金型１３２０は、収容金型１３１０に対して離接する方向に移動可能に構成されている。 The annular pressing mold 1320 is for crushing the protruding portion 1205 of the intermediate compact 1200 between itself and the housing mold 1310 as will be described later. The annular pressing mold 1320 is annularly provided so as to face the opening edge of the housing recess 1311 . A through hole 1321 is formed in a portion of the annular pressing mold 1320 that faces the accommodation recess 1311 . The annular pressing mold 1320 is configured to be movable in the depth direction of the intermediate compact 1200 (horizontal direction in FIG. 10). That is, the ring-shaped pressing mold 1320 is configured to be movable in the directions of separating and contacting with respect to the housing mold 1310 .

凸状押圧金型１３３０は、内壁形成部１２０２を押圧して反転させるためのものである。言い換えれば、凸状押圧金型１３３０は、容器１１０の凹部１１１を形成するための金型である。この凸状押圧金型１３３０は、環状押圧金型１３２０と同様に、中間成形体１２００の深さ方向（図１０中の左右方向）で、移動可能に構成されている。より詳しくは、凸状押圧金型１３３０は、環状押圧金型１３２０の貫通孔１３２１を通過して、収容凹部１３１１内に挿入可能に構成されている。 The convex pressing mold 1330 is for pressing and inverting the inner wall forming portion 1202 . In other words, the convex pressing mold 1330 is a mold for forming the concave portion 111 of the container 110 . Like the annular pressing die 1320, the convex pressing die 1330 is configured to be movable in the depth direction of the intermediate compact 1200 (horizontal direction in FIG. 10). More specifically, the convex pressing die 1330 is configured to pass through the through hole 1321 of the annular pressing die 1320 and be inserted into the housing recess 1311 .

また本実施形態では、凸状押圧金型１３３０は、後述するように環状押圧金型１３２０と収容金型１３１０とによって突出部１２０５が圧潰された状態で、中間成形体１２００の深さ方向（図１０中の左右方向）で、移動可能に構成されている。 Further, in this embodiment, the convex pressing mold 1330 is formed in a state in which the protruding portion 1205 is crushed by the annular pressing mold 1320 and the housing mold 1310 as will be described later. 10), and is configured to be movable.

本実施形態では、このような構成の反転装置１３００によって中間成形体１２００の内壁形成部１２０２を反転させることで、最終製品である二重壁容器１１０を形成する。 In this embodiment, the double-walled container 110, which is the final product, is formed by inverting the inner wall forming portion 1202 of the intermediate molded body 1200 by the inverting device 1300 having such a configuration.

まずは図１１Ａに示すように、収容金型１３１０の収容凹部１３１１内に中間成形体１２００の外壁形成部１２０３及びネック部１２０１を収容する。このとき、突出部１２０５は、収容金型１３１０の開口周縁の端面１３１０ａ上に突出した状態となる。 First, as shown in FIG. 11A , the outer wall forming portion 1203 and the neck portion 1201 of the intermediate compact 1200 are accommodated in the accommodating recess 1311 of the accommodating mold 1310 . At this time, the protruding portion 1205 protrudes above the end surface 1310 a of the opening peripheral edge of the housing mold 1310 .

この状態で、図１１Ｂに示すように、環状押圧金型１３２０を収容金型１３１０側に移動させ、環状押圧金型１３２０と収容金型１３１０とで中間成形体１２００の突出部１２０５を圧潰する（圧潰工程）。 In this state, as shown in FIG. 11B, the annular pressing mold 1320 is moved toward the housing mold 1310, and the annular pressing mold 1320 and the housing mold 1310 crush the protrusion 1205 of the intermediate molded body 1200 ( crushing process).

これにより、容器１１０の環状フランジ部１６０が形成される。また上述のように凸部１２０４に第１の湾曲部１２０６及び第２の湾曲部１２０７が形成されていることで、環状フランジ部１６０を構成する内壁部１２０と外壁部１３０との隙間を比較的狭くすることができる。 Thereby, the annular flange portion 160 of the container 110 is formed. In addition, since the first curved portion 1206 and the second curved portion 1207 are formed on the convex portion 1204 as described above, the gap between the inner wall portion 120 and the outer wall portion 130 constituting the annular flange portion 160 is relatively large. can be narrowed.

その際、突出部１２０５は所定温度（１００℃～１４０℃）に加熱された状態で圧潰されることが好ましい。すなわち、反転装置１３００は、中間成形体１２００の突出部１２０５を所定温度に調整する温調装置を備えていることが好ましい。 At that time, it is preferable that the projecting portion 1205 is crushed while being heated to a predetermined temperature (100° C. to 140° C.). That is, it is preferable that the reversing device 1300 includes a temperature control device that adjusts the protrusion 1205 of the intermediate molded body 1200 to a predetermined temperature.

例えば、環状押圧金型１３２０には、温水や油等の温調媒体が供給される供給路（図示なし）が形成されており、この供給路内に供給装置（温調装置）によって温調媒体を供給することで、環状押圧金型１３２０の温度（表面温度）を調整することができるようになっている。 For example, the annular pressing mold 1320 is formed with a supply path (not shown) for supplying a temperature control medium such as hot water or oil. is supplied, the temperature (surface temperature) of the annular pressing die 1320 can be adjusted.

そして、表面温度が調整された環状押圧金型１３２０を突出部１２０５に接触させ、突出部１２０５を所定温度まで上昇させた状態で、環状押圧金型１３２０と収容金型１３１０とで圧潰する。 Then, the ring-shaped pressing die 1320 whose surface temperature is adjusted is brought into contact with the projecting portion 1205 , and the ring-shaped pressing die 1320 and the housing die 1310 crush the projecting portion 1205 while raising the temperature to a predetermined temperature.

なお温調装置の構成は、特に限定されず、例えば、環状押圧金型１３２０を加熱するヒータであってもよいし、突出部１２０５自体を加熱するヒータであってもよい。 The configuration of the temperature control device is not particularly limited, and may be, for example, a heater that heats the annular pressing mold 1320 or a heater that heats the projecting portion 1205 itself.

次に、環状押圧金型１３２０と収容金型１３１０とで突出部１２０５を圧潰した状態を保持したまま、図１１Ｃに示すように、凸状押圧金型１３３０を収容金型１３１０側に移動させ、内壁形成部１２０２を収容凹部１３１１内に押し込んで反転させる。つまり内壁形成部１２０２を外壁形成部１２０３の内側に押し込んで反転させる（反転工程）。 Next, as shown in FIG. 11C , the convex pressing mold 1330 is moved toward the housing mold 1310 while maintaining the state in which the projecting portion 1205 is crushed by the annular pressing mold 1320 and the housing mold 1310 . The inner wall forming portion 1202 is pushed into the housing recess 1311 and turned over. In other words, the inner wall forming portion 1202 is pushed into the outer wall forming portion 1203 and reversed (reversing step).

具体的には、凸状押圧金型１３３０を収容金型１３１０側に移動させると、凸状押圧金型１３３０の先端面が内壁形成部１２０２の底部１２０２ａに当接する。底部１２０２ａが押圧されることで、内壁形成部１２０２の胴部１２０２ｂが変形（反転）し、外壁形成部１２０３の内側に押し込まれる。 Specifically, when the convex pressing mold 1330 is moved toward the housing mold 1310 , the tip surface of the convex pressing mold 1330 comes into contact with the bottom portion 1202 a of the inner wall forming portion 1202 . By pressing the bottom portion 1202 a , the trunk portion 1202 b of the inner wall forming portion 1202 is deformed (inverted) and pushed inside the outer wall forming portion 1203 .

またその際、凸部１２０４が凸状押圧金型１３３０によって押圧されることで反転し、係合溝１２４が形成される。これにより、装着部１２３に係合溝１２４を備えると共に、環状フランジ部１６０（補強部１５０）を備える二重壁容器１１０が形成される（図６参照）。 At this time, the convex portion 1204 is pressed by the convex pressing mold 1330 and reversed to form the engagement groove 124 . As a result, the double-walled container 110 having the engaging groove 124 in the mounting portion 123 and the annular flange portion 160 (reinforcing portion 150) is formed (see FIG. 6).

上記の通り、二重壁容器１１０に補強部１５０（中間成形体１２００に突出部１２０５）を設けることにより、反転工程時の内壁形成部１２０２と外壁形成部１２０３との境界部分に生じうる好ましくない変形を抑止し、賦形性を向上させることができる。この結果、開口１１１ａ付近の強度を向上した二重壁容器１１０の製造が可能になる。つまり、反転工程がある製造方法においても、蓋部材１９０を良好に装着できる装着部１２３（開口１１１ａ）を備えた二重壁容器１１０を成形できる。 As described above, by providing the reinforcing portion 150 (the protruding portion 1205 on the intermediate molded body 1200) in the double-walled container 110, the boundary between the inner wall-forming portion 1202 and the outer wall-forming portion 1203 during the reversing process is not preferable. Deformation can be suppressed, and formability can be improved. As a result, it is possible to manufacture a double-walled container 110 with improved strength in the vicinity of the opening 111a. That is, the double-walled container 110 having the mounting portion 123 (opening 111a) to which the lid member 190 can be satisfactorily mounted can be molded even in a manufacturing method including an inversion step.

なお、凸状押圧金型１３３０によって内壁形成部１２０２を反転させる際、内壁形成部１２０２を所定温度に調整するようにしてもよい。例えば、反転装置１３００が、内壁形成部１２０２を加熱するヒータ等の温調装置を備えるようにしてもよい。 When the inner wall forming portion 1202 is reversed by the convex pressing mold 1330, the inner wall forming portion 1202 may be adjusted to a predetermined temperature. For example, the reversing device 1300 may include a temperature control device such as a heater for heating the inner wall forming portion 1202 .

ただし、内壁形成部１２０２を加熱する場合、内壁形成部１２０２の胴部１２０２ｂを加熱し、凸状押圧金型１３３０が当接する底部１２０２ａは極力加熱しないことが好ましい。これにより、凸状押圧金型１３３０によって内壁形成部１２０２を適切に押圧でき、内壁形成部１２０２を良好に反転させることができる。またその際、内壁形成部１２０２に設けられている凸部１２０４を良好に反転させることができる。 However, when the inner wall forming portion 1202 is heated, it is preferable to heat the trunk portion 1202b of the inner wall forming portion 1202 and not heat the bottom portion 1202a with which the convex pressing mold 1330 abuts as much as possible. As a result, the inner wall forming portion 1202 can be appropriately pressed by the convex pressing mold 1330, and the inner wall forming portion 1202 can be satisfactorily inverted. Further, at this time, the convex portion 1204 provided on the inner wall forming portion 1202 can be satisfactorily reversed.

このような本実施形態の製造方法により二重壁容器１１０を製造することで、つまり反転装置１３００によって中間成形体１２００を反転させて二重壁容器１１０を製造することで、二重壁容器１１０の製造工程を簡略化することができる。したがって、二重壁容器１１０の製造効率を向上することができる。 By manufacturing the double-walled container 110 by the manufacturing method of this embodiment, that is, by manufacturing the double-walled container 110 by turning over the intermediate molded body 1200 with the turning device 1300, the double-walled container 110 manufacturing process can be simplified. Therefore, the manufacturing efficiency of the double-walled container 110 can be improved.

また、上記製造方法では、二重壁容器１１０の脚部１３２は射出成形によって形成され、その他の部分はブロー成形によって形成されている。したがって、脚部１３２は、その他の部分に比べて肉厚に形成されている。これにより、二重壁容器１１０を載置した際の安定性を向上することができる。 Further, in the manufacturing method described above, the legs 132 of the double-walled container 110 are formed by injection molding, and the other portions are formed by blow molding. Therefore, the leg portion 132 is formed thicker than the other portions. This can improve the stability when the double-walled container 110 is placed.

＜第三実施形態＞
図１２は、本開示の第三実施形態に係る二重壁容器及び蓋部材を示す正面図である。図１３は、図１２のＢ－Ｂ線に対応する部分の断面図である。図１４は、図１２のＣ－Ｃ線に対応する部分の断面図である。また図１５Ａ及び図１５Ｂは、第三実施形態に係る二重壁容器の製造方法を説明する図である。図１６は、中間成形体の要部を示す図である。なお各図中において第二実施形態と同一部材には同一符号を付し、重複する説明は省略する。<Third Embodiment>
Fig. 12 is a front view of a double-walled container and lid member according to a third embodiment of the present disclosure; 13 is a sectional view of a portion corresponding to line BB of FIG. 12. FIG. 14 is a cross-sectional view of a portion corresponding to line CC of FIG. 12. FIG. 15A and 15B are diagrams for explaining the method of manufacturing the double-walled container according to the third embodiment. FIG. 16 is a diagram showing the main part of the intermediate molded body. In addition, in each figure, the same members as those in the second embodiment are denoted by the same reference numerals, and redundant explanations are omitted.

図１２～図１４に示すように、本実施形態に係る二重壁容器１１０Ａは、その外周面側が蓋部材１９０Ａを装着可能に構成されている。具体的には、外壁部１３０Ａの外方胴部１３１Ａには、開口１１１ａ側の端部に、蓋部材１９０Ａが装着される装着部１２３Ａが設けられている。装着部１２３Ａは、二重壁容器１１０Ａに装着する際に、蓋部材１９０Ａが摺接する部分であり、容器１１０Ａの上下方向で略平面に形成されている。また装着部１２３Ａには、蓋部材１９０Ａを容器１１０Ａに固定するための複数（例えば、６つ）の係合溝１２４Ａが周方向に所定の間隔で形成されている。 As shown in FIGS. 12 to 14, the double-walled container 110A according to this embodiment is configured such that the lid member 190A can be attached to the outer peripheral surface thereof. Specifically, the outer trunk portion 131A of the outer wall portion 130A is provided with a mounting portion 123A to which the lid member 190A is mounted at the end on the opening 111a side. The mounting portion 123A is a portion with which the lid member 190A slides when it is mounted on the double-walled container 110A, and is formed substantially flat in the vertical direction of the container 110A. A plurality of (for example, six) engagement grooves 124A for fixing the lid member 190A to the container 110A are formed in the mounting portion 123A at predetermined intervals in the circumferential direction.

蓋部材１９０Ａは、二重壁容器１１０Ａの外壁部１３０Ａに対して装着される、いわゆる外蓋である。蓋部材１９０Ａは、開口１１１ａに対向する蓋部本体１９１Ａと、蓋部本体１９１Ａの外周部に設けられて内面側が装着部１２３Ａに対向する環状の縦壁部１９２Ａと、を備えている。縦壁部１９２Ａには、各係合溝１２４Ａ側（蓋部材１９０Ａの内側）に突出する複数の係合凸部１９３Ａが設けられている。これら複数の係合凸部１９３Ａが係合溝１２４Ａに係合されることで、蓋部材１９０Ａが容器１１０Ａに固定されるようになっている。 The lid member 190A is a so-called outer lid attached to the outer wall portion 130A of the double-walled container 110A. The lid member 190A includes a lid main body 191A facing the opening 111a, and an annular vertical wall portion 192A provided on the outer peripheral portion of the lid main body 191A and facing the mounting portion 123A on the inner surface side. The vertical wall portion 192A is provided with a plurality of engaging projections 193A projecting toward the engaging grooves 124A (inside the lid member 190A). The lid member 190A is fixed to the container 110A by engaging the plurality of engaging protrusions 193A with the engaging grooves 124A.

また装着部１２３Ａには、開口１１１ａ側の端部から係合溝１２４Ａに向かって延在する誘導溝１３３が設けられている。この誘導溝１３３は、蓋部材１９０Ａの係合凸部１９３Ａを係合溝１２４Ａに係合させる際、係合凸部１９３Ａを係合溝１２４Ａまで誘導（ガイド）するためのものである。誘導溝１３３は、容器１１０Ａの周方向における係合溝１２４Ａの側部まで連続して形成されている。また誘導溝１３３は、開口１１１ａ側の端面に開口して設けられており、この開口が蓋部材１９０Ａの係合凸部１９３Ａを誘導溝１３３に進入させるための入口１３３ａとなっている。 Further, the mounting portion 123A is provided with a guide groove 133 extending from the end on the side of the opening 111a toward the engagement groove 124A. The guiding groove 133 guides the engaging protrusion 193A to the engaging groove 124A when engaging the engaging protrusion 193A of the lid member 190A with the engaging groove 124A. The guide groove 133 is formed continuously to the side of the engagement groove 124A in the circumferential direction of the container 110A. Further, the guide groove 133 is opened at the end face on the side of the opening 111a, and this opening serves as an entrance 133a for allowing the engagement convex portion 193A of the lid member 190A to enter the guide groove 133. As shown in FIG.

係合溝１２４Ａと誘導溝１３３との境界部分には、係合溝１２４Ａに係合された係合凸部１９３Ａの移動を規制する規制突起１３４が設けられている。この規制突起１３４は、容器１１０Ａの高さ方向に延在し、また装着部１２３Ａの表面よりも低く形成されている。言い換えれば、規制突起１３４は、係合溝１２４Ａ及び誘導溝１３３の深さよりも低い高さで形成されている。 At the boundary between the engaging groove 124A and the guiding groove 133, a restricting protrusion 134 is provided to restrict the movement of the engaging protrusion 193A engaged with the engaging groove 124A. This restricting projection 134 extends in the height direction of the container 110A and is formed lower than the surface of the mounting portion 123A. In other words, the restricting projection 134 is formed with a height lower than the depths of the engaging groove 124A and the guide groove 133. As shown in FIG.

ところで、第二実施形態では、内壁部１２０と外壁部１３０との境界部分に補強部１５０として環状フランジ部１６０が設けられていたが、第三実施形態では、容器１１０Ａの内壁部１２０Ａと外壁部１３０Ａは、開口１１１ａ側の端面を形成する連結部１７０を介して連結されている（図１４参照）。そして、この連結部１７０には、装着部１２３Ａ側の端部（外壁部１３０Ａ側の端部）から離間した位置に突出し、容器１１０Ａの周方向に亘って連続する環状リブ１８０が形成されている。環状リブ１８０は、その外壁部１３０Ａ側の側面と連結部１７０の表面とで形成される隅部の角度θが鋭角となるように形成されている。 By the way, in the second embodiment, the annular flange portion 160 was provided as the reinforcing portion 150 at the boundary portion between the inner wall portion 120 and the outer wall portion 130, but in the third embodiment, the inner wall portion 120A and the outer wall portion of the container 110A 130A are connected via a connecting portion 170 forming an end face on the opening 111a side (see FIG. 14). The connecting portion 170 is formed with an annular rib 180 that protrudes at a position spaced apart from the end portion on the side of the mounting portion 123A (the end portion on the side of the outer wall portion 130A) and continues in the circumferential direction of the container 110A. . The annular rib 180 is formed so that the angle θ of the corner formed by the side surface on the side of the outer wall portion 130A and the surface of the connecting portion 170 is an acute angle.

また上述のように誘導溝１３３は、開口１１１ａ側の端面、つまり連結部１７０側に開口して設けられており、この開口が蓋部材１９０Ａの係合凸部１９３Ａを誘導溝１３３に進入させるための入口１３３ａとなっている。 Further, as described above, the guide groove 133 is provided so as to open on the end face on the opening 111a side, that is, on the connecting portion 170 side. has an entrance 133a.

そして、この誘導溝１３３の入口１３３ａには、容器１１０Ａの周方向に延びる補強リブ１３６が設けられている。この補強リブ１３６は、環状リブ１８０と共に、装着部１２３Ａを補強するための補強部１５０Ａとして機能する。この補強リブ１３６は、規制突起１３４と同様に、装着部１２３Ａの表面よりも低く形成されている。つまり補強リブ１３６は、誘導溝１３３の深さよりも低い高さで形成されている。なお補強リブ１３６の高さは、一定であってもよいが、係合溝１２４Ａから離れるほど低くなっていてもよい。 At the inlet 133a of the guide groove 133, a reinforcing rib 136 extending in the circumferential direction of the container 110A is provided. The reinforcing rib 136 functions together with the annular rib 180 as a reinforcing portion 150A for reinforcing the mounting portion 123A. This reinforcing rib 136 is formed lower than the surface of the mounting portion 123A, similarly to the restricting projection 134. As shown in FIG. That is, the reinforcing rib 136 is formed with a height lower than the depth of the guide groove 133 . The height of the reinforcing rib 136 may be constant, or may decrease as the distance from the engagement groove 124A increases.

また補強リブ１３６は、本実施形態では、誘導溝１３３の両側面間に亘って連続して設けられているが（図１３参照）、補強リブ１３６の形状は、特に限定されるものではない。補強リブ１３６は、例えば、誘導溝１３３の両側面間に断続的に設けられていてもよい。 Further, in this embodiment, the reinforcing rib 136 is provided continuously across both side surfaces of the guide groove 133 (see FIG. 13), but the shape of the reinforcing rib 136 is not particularly limited. The reinforcing ribs 136 may be intermittently provided between both side surfaces of the guide groove 133, for example.

このような環状リブ１８０及び補強リブ１３６を含む補強部１５０Ａが設けられていることで、容器１１０Ａの強度、特に、装着部１２３Ａ付近の強度が高められている。特に、環状リブ１８０の外壁部１３０Ａ側の側面と連結部１７０の表面とで形成される隅部の角度θが鋭角となっていることで、装着部１２３Ａ付近の強度がより高められる。 By providing the reinforcing portion 150A including the annular rib 180 and the reinforcing rib 136, the strength of the container 110A, particularly the strength near the mounting portion 123A is increased. In particular, since the corner formed by the side surface of the annular rib 180 on the side of the outer wall portion 130A and the surface of the connecting portion 170 has an acute angle θ, the strength of the vicinity of the mounting portion 123A is further increased.

これにより、装着部１２３Ａに複数の係合溝１２４Ａや誘導溝１３３が形成されていても、開口１１１ａの周縁部を含む装着部１２３Ａ付近の強度が十分に確保される。したがって、例えば、容器１１０Ａ内に飲料等が収容された状態でも、容器１１０Ａの変形が抑制される。 As a result, even if a plurality of engagement grooves 124A and guide grooves 133 are formed in the mounting portion 123A, sufficient strength is ensured in the vicinity of the mounting portion 123A including the peripheral portion of the opening 111a. Therefore, for example, deformation of the container 110A is suppressed even when a beverage or the like is stored in the container 110A.

なお、このような形状の容器１１０Ａに蓋部材１９０Ａを装着する際には、まず蓋部材１９０Ａの係合凸部１９３Ａを、誘導溝１３３の入口１３３ａから誘導溝１３３内に進入させる。すなわち補強リブ１３６を乗り越えさせて、係合凸部１９３Ａを誘導溝１３３内に進入させる。上述のように補強リブ１３６は、誘導溝１３３の深さよりも低く形成されている。したがって、比較的容易に係合凸部１９３Ａを誘導溝１３３内に進入させることができる。 When attaching the lid member 190A to the container 110A having such a shape, first, the engaging projection 193A of the lid member 190A is inserted into the guide groove 133 from the entrance 133a of the guide groove 133. As shown in FIG. That is, the engaging protrusion 193A is caused to enter the guide groove 133 by getting over the reinforcing rib 136 . As described above, the reinforcing ribs 136 are formed to have a depth lower than that of the guide grooves 133 . Therefore, the engaging projection 193A can enter the guide groove 133 relatively easily.

この状態で、蓋部材１９０Ａと容器１１０Ａとを相対的に回転させると、係合凸部１９３Ａは誘導溝１３３に沿って移動して規制突起１３４に当接する。その後さらに、蓋部材１９０Ａと容器１１０Ａとを相対的に回転させることで、規制突起１３４を乗り越えさせて係合凸部１９３Ａを係合溝１２４Ａに係合させる。 In this state, when the lid member 190A and the container 110A are relatively rotated, the engagement protrusion 193A moves along the guide groove 133 and comes into contact with the restriction projection 134. As shown in FIG. Thereafter, the lid member 190A and the container 110A are further rotated relative to each other, so that the restricting projection 134 is overcome and the engaging projection 193A is engaged with the engaging groove 124A.

上述のように規制突起１３４は、誘導溝１３３や係合溝１２４Ａの深さよりも低く形成されている。したがって、係合凸部１９３Ａは、誘導溝１３３から外れることなく規制突起１３４を乗り越え、係合溝１２４Ａに良好に係合される。 As described above, the restricting projection 134 is formed lower than the guide groove 133 and the engagement groove 124A. Therefore, the engaging projection 193A climbs over the restricting projection 134 without being disengaged from the guide groove 133, and is well engaged with the engaging groove 124A.

このような第三実施形態に係る容器１１０Ａも、第二実施形態と同様に、まずは図１５Ａに示すように、所定形状のプリフォーム１１００を射出成形によって形成する（射出成形工程）。次いで、このプリフォーム１１００の胴部１１０２をブロー成形することにより、図１５Ｂに示すように、所定形状の中間成形体１２００Ａを形成する。 For such a container 110A according to the third embodiment, as in the second embodiment, first, as shown in FIG. 15A, a preform 1100 having a predetermined shape is formed by injection molding (injection molding step). Next, by blow-molding the body portion 1102 of the preform 1100, an intermediate molded body 1200A having a predetermined shape is formed as shown in FIG. 15B.

中間成形体１２００Ａの外壁形成部１２０３Ａは、容器１１０Ａの外壁部１３０Ａと同一形状に形成されている。すなわち、中間成形体１２００Ａの外壁形成部１２０３Ａには、図１６の拡大図に示すように、係合溝１２４Ａ及び誘導溝１３３が形成されていると共に、規制突起１３４及び補強リブ１３６も形成されている。さらに中間成形体１２００Ａには、外壁形成部１２０３Ａと内壁形成部１２０２Ａとの境界部分には、環状リブ１８０が既に形成されている。つまり、中間成形体１２００Ａは、環状リブ１８０及び補強リブ１３６を含む補強部１５０Ａを既に備えている。 An outer wall forming portion 1203A of the intermediate molded body 1200A is formed in the same shape as the outer wall portion 130A of the container 110A. That is, as shown in the enlarged view of FIG. 16, the outer wall forming portion 1203A of the intermediate molded body 1200A is formed with an engaging groove 124A and a guide groove 133, and is also formed with a restricting protrusion 134 and a reinforcing rib 136. there is Further, an annular rib 180 is already formed at the boundary portion between the outer wall forming portion 1203A and the inner wall forming portion 1202A in the intermediate formed body 1200A. That is, the intermediate molded body 1200A already has the reinforcing portion 150A including the annular rib 180 and the reinforcing rib 136. As shown in FIG.

そして、このように補強部１５０Ａを備える中間成形体１２００Ａをブロー成形装置から反転装置に搬送し、反転装置によって内壁形成部１２０２Ａを押圧して反転させることによって、最終製品である二重壁容器１１０Ａを形成する（反転工程）。 Then, the intermediate molded body 1200A having the reinforcing portion 150A is transported from the blow molding device to the reversing device, and the inner wall forming portion 1202A is pressed and reversed by the reversing device, thereby forming the double-walled container 110A as the final product. (reversal step).

内壁形成部１２０２Ａと外壁形成部１２０３Ａとの境界部分の強度が低いと、反転工程により内壁形成部１２０２Ａを良好に反転させることができない虞がある。例えば、内壁形成部１２０２Ａと外壁形成部１２０３Ａとの境界付近に皺が形成されてしまうといった問題が生じる虞がある。 If the strength of the boundary portion between the inner wall forming portion 1202A and the outer wall forming portion 1203A is low, the inner wall forming portion 1202A may not be satisfactorily reversed in the reversing process. For example, there is a possibility that wrinkles may be formed near the boundary between the inner wall forming portion 1202A and the outer wall forming portion 1203A.

しかしながら、本実施形態に係る中間成形体１２００Ａには、既に環状リブ１８０及び補強リブ１３６を含む補強部１５０Ａが形成され、内壁形成部１２０２Ａと外壁形成部１２０３Ａとの境界部分の強度が高められている。したがって、反転工程により内壁形成部１２０２Ａを良好に反転させることができる。 However, the reinforcing portion 150A including the annular rib 180 and the reinforcing rib 136 is already formed in the intermediate molded body 1200A according to the present embodiment, and the strength of the boundary portion between the inner wall forming portion 1202A and the outer wall forming portion 1203A is increased. there is Therefore, the inner wall forming portion 1202A can be satisfactorily reversed by the reversing process.

上述の通り、二重壁容器１１０Ａや中間成形体１２００Ａに補強部１５０Ａ（環状リブ１８０及び補強リブ１３６）を設けることにより、反転工程時の内壁形成部１２０２Ａと外壁形成部１２０３Ａとの境界部分に生じうる好ましくない変形を抑止し、賦形性を向上させることができる。この結果、開口１１１ａ付近の強度が向上し、かつ、開口１１１ａの天面が平坦化した二重壁容器１１０Ａの製造が可能になる。つまり、反転工程がある製造方法であっても、蓋部材１９０Ａを良好に装着できる装着部１２３Ａ（開口１１１ａ）を備えた二重壁容器１１０Ａを成形することができる。 As described above, by providing the reinforcing portion 150A (the annular rib 180 and the reinforcing rib 136) to the double-walled container 110A and the intermediate molded body 1200A, the boundary portion between the inner wall forming portion 1202A and the outer wall forming portion 1203A during the reversing process can be Unfavorable deformation that may occur can be suppressed, and formability can be improved. As a result, the strength of the vicinity of the opening 111a is improved, and it is possible to manufacture the double-walled container 110A in which the top surface of the opening 111a is flattened. In other words, even with a manufacturing method including an inversion step, the double-walled container 110A having the attachment portion 123A (opening 111a) to which the lid member 190A can be satisfactorily attached can be molded.

以上、本開示の実施形態について説明したが、本開示は、上述した実施形態に限定されるものではない。 Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments.

例えば、第一実施形態では、二重壁容器１０が環状フランジ部６０を有し、この環状フランジ部６０が圧潰部５０で構成された例を説明したが、二重壁容器１０は、必ずしも環状フランジ部６０を備えていなくてもよい。二重壁容器１０が環状フランジ部６０を備えていない場合でも、凹部１１の開口縁部に圧潰部５０が設けられていれば、二重壁容器１０の強度は向上する。 For example, in the first embodiment, the double-walled container 10 has the annular flange portion 60, and the annular flange portion 60 is configured by the crushing portion 50. However, the double-walled container 10 does not necessarily have an annular The flange portion 60 may not be provided. Even if the double-walled container 10 does not have the annular flange portion 60, the strength of the double-walled container 10 is improved if the crushing portion 50 is provided at the opening edge of the recess 11. FIG.

例えば、第二実施形態では、中間成形体１２００の突出部１２０５を環状押圧金型１３２０と収容金型１３１０とで圧潰した状態で反転工程を実施したが、この例に限られない。例えば反転工程は、突出部１２０５の圧潰を解除した状態で実施されてもよい。つまり突出部１２０５が既に十分に圧潰されていれば、反転工程を実施する際に、突出部１２０５が環状押圧金型１３２０と収容金型１３１０とで圧潰された状態が維持されていなくてもよい。 For example, in the second embodiment, the reversing step was performed while the projecting portion 1205 of the intermediate molded body 1200 was crushed by the annular pressing mold 1320 and the housing mold 1310, but the present invention is not limited to this example. For example, the inversion process may be performed in a state in which the protrusion 1205 is released from being crushed. That is, as long as the projecting portion 1205 has already been sufficiently crushed, the state in which the projecting portion 1205 is crushed by the annular pressing mold 1320 and the housing mold 1310 does not have to be maintained when performing the reversing step. .

また、射出成形装置とブロー成形装置は、独立した構成（２ステージ式の成形装置）としても、一体式の構成（１ステージ式の成形装置）としても構わない。さらに、反転装置も、ブロー成形装置と独立または一体式の何れの構成であっても構わない。 Further, the injection molding apparatus and the blow molding apparatus may be configured independently (two-stage molding apparatus) or integrated (one-stage molding apparatus). Further, the reversing device may also be constructed either independently or integrally with the blow molding device.

本出願は、２０１８年８月２２日に出願された日本国特許出願（特願２０１８－１５５８１５号、特願２０１８－１５５８１６号）及び２０１８年９月７日に出願された日本国特許出願（特願２０１８－１６８２５８号）に開示された内容を適宜援用する。 This application is a Japanese patent application filed on August 22, 2018 (Japanese Patent Application No. 2018-155815, Japanese Patent Application No. 2018-155816) and a Japanese patent application filed on September 7, 2018 (Japanese Patent Application No. 2018-155816). Applicant No. 2018-168258) is incorporated as appropriate.

Claims (14)

容器の内面を形成する内方胴部及び内方底部を有する内壁部と、前記内壁部の上端から連続して前記内壁部とは隙間を空けて設けられて前記容器の外面を形成する外方胴部を有する外壁部と、を備える二重壁容器の製造方法であって、
前記外壁部となる外壁形成部と、前記内壁部となり前記外壁形成部の深さ方向の外側に膨出した内壁形成部と、前記内壁形成部と前記外壁形成部との境界部分に設けられて前記外壁形成部の径方向外側に突出する突出部と、を有する中間成形体をブロー成形により形成するブロー成形工程と、
前記内壁形成部を前記外壁形成部の内側に押し込んで反転させることで前記中間成形体を前記二重壁容器とする反転工程と、
前記反転工程の前に実施され、前記中間成形体の深さ方向で前記突出部を圧潰して前記内壁形成部と前記外壁形成部との境界部分に折り目を付ける圧潰工程と、を含む、二重壁容器の製造方法。 an inner wall portion having an inner trunk portion and an inner bottom portion forming the inner surface of the container; A method of manufacturing a double-walled container comprising: an outer wall having a body;
an outer wall forming portion serving as the outer wall portion; an inner wall forming portion serving as the inner wall portion and bulging outward in the depth direction of the outer wall forming portion; and a boundary portion between the inner wall forming portion and the outer wall forming portion. a blow molding step of forming, by blow molding, an intermediate molded body having a protruding portion that protrudes radially outward from the outer wall forming portion;
an inversion step of pushing the inner wall forming portion into the outer wall forming portion and inverting the intermediate molded body into the double-walled container;
a crushing step that is performed before the reversing step and crushes the protruding portion in the depth direction of the intermediate molded body to crease a boundary portion between the inner wall forming portion and the outer wall forming portion; A method for manufacturing a heavy-walled container. 前記反転工程は、前記突出部を圧潰した状態で実施される、請求項１に記載の二重壁容器の製造方法。 2. The method of manufacturing a double-walled container according to claim 1, wherein said reversing step is performed with said protrusions being crushed. 前記圧潰工程では、前記突出部を所定温度に調整した状態で当該突出部を圧潰する、請求項１に記載の二重壁容器の製造方法。 2. The method of manufacturing a double-walled container according to claim 1, wherein in the crushing step, the protrusion is crushed while the protrusion is adjusted to a predetermined temperature. 一方の端面に開口し、前記突出部が前記端面上に突出した状態に前記中間成形体の前記外壁形成部が収容される収容凹部を備える収容金型と、
前記収容凹部の開口縁部に環状に配置されると共に前記中間成形体の深さ方向で移動可能に構成され、前記収容金型の前記端面に対して前記突出部を押圧する環状押圧金型と、
前記中間成形体の深さ方向で移動可能に構成され、前記内壁形成部をその底部側から押圧して前記外壁形成部の内側に押し込んで反転させる凸状押圧金型と、を備える、請求項１に記載の二重壁容器の製造方法で用いられる反転装置。 a housing mold that is open to one end face and has a housing recess in which the outer wall forming portion of the intermediate molded body is housed in a state in which the projecting portion protrudes above the end face;
an annular pressing mold arranged annularly at the opening edge of the housing recess and configured to be movable in the depth direction of the intermediate molded body for pressing the projecting portion against the end surface of the housing mold; ,
A convex pressing mold that is configured to be movable in the depth direction of the intermediate molded body, and presses the inner wall forming portion from its bottom side to push it into the outer wall forming portion and reverse it. 2. An inverting device used in the method for manufacturing a double-walled container according to 1. 前記凸状押圧金型は、前記環状押圧金型と前記収容金型とによって前記突出部を圧潰した状態で、前記中間成形体の深さ方向で移動可能に構成されている、請求項４に記載の反転装置。 5. The method according to claim 4, wherein the convex pressing die is configured to be movable in the depth direction of the intermediate molded body in a state where the projecting portion is crushed by the annular pressing die and the housing die. Inverting device as described . 前記中間成形体の前記突出部を所定温度に調整する温調装置を備えている、請求項４に記載の反転装置。 5. The reversing device according to claim 4, further comprising a temperature control device for adjusting said projecting portion of said intermediate molded body to a predetermined temperature. 前記温調装置は、前記環状押圧金型の温度を調整する、請求項６に記載の反転装置。 7. The reversing device according to claim 6, wherein said temperature control device adjusts the temperature of said annular pressing mold. 容器の内面を形成する内方胴部及び内方底部を有する内壁部と、
前記内壁部の上端から連続して前記内壁部とは隙間を空けて設けられて前記容器の外面を形成する外方胴部を有する外壁部と、を備え、
前記内壁部と前記外壁部との境界部分には、前記内壁部と前記外壁部とを圧潰して折り目を付けた圧潰部が周方向に亘って設けられており、前記圧潰部を構成する前記内壁部と前記外壁部との隙間は、前記内方胴部と前記外方胴部との隙間よりも狭くなっており、
前記圧潰部を構成する前記内壁部の前記内方胴部との境界部分には、前記外壁部側を凸として湾曲する内湾曲部が形成されていると共に、前記圧潰部を構成する前記外壁部の前記外方胴部との境界部分には、前記内壁部側を凸として湾曲する外湾曲部が形成されており、
前記内湾曲部と前記外湾曲部との隙間が、前記圧潰部の他の部分の隙間よりも狭くなっている、二重壁容器。 an inner wall portion having an inner body and an inner bottom forming the inner surface of the container;
an outer wall portion having an outer body portion formed continuously from the upper end of the inner wall portion with a gap from the inner wall portion and forming the outer surface of the container;
At a boundary portion between the inner wall portion and the outer wall portion, a crushed portion formed by crushing the inner wall portion and the outer wall portion to form a crease is provided in a circumferential direction, and the crushed portion constitutes the crushed portion. The gap between the inner wall portion and the outer wall portion is narrower than the gap between the inner barrel portion and the outer barrel portion,
An inner curved portion that curves so as to protrude toward the outer wall portion is formed at a boundary portion between the inner wall portion that constitutes the crushing portion and the inner trunk portion, and the outer wall portion that constitutes the crushing portion. an outer curved portion that curves so that the inner wall portion side is convex is formed at a boundary portion with the outer trunk portion of
A double-walled container, wherein the gap between the inner curve and the outer curve is narrower than the gap between the other portions of the crushing section . 前記圧潰部は、前記内壁部及び前記外壁部が前記外方胴部の外側に突出する環状フランジ部を構成している、請求項８に記載の二重壁容器。 9. The double-walled container according to claim 8, wherein said crushing portion comprises an annular flange portion in which said inner wall portion and said outer wall portion protrude outside said outer barrel portion. 一端側が開口する凹部の内面を形成する内方胴部を有する内壁部と、
前記内壁部から連続して当該内壁部とは隙間を空けて設けられて容器の外面を形成する外方胴部を有する外壁部と、を備える二重壁容器であって、
前記内壁部又は前記外壁部の一方は、前記開口側の端部に当該開口を覆う蓋部材が装着される装着部を有し、該装着部には、前記蓋部材が備える複数の係合凸部が係合される複数の係合溝が設けられており、
且つ前記内壁部と前記外壁部との境界部分には、前記装着部を補強するための補強部が周方向に沿って設けられており、
前記装着部が、前記内壁部に設けられており、
前記補強部は、前記内壁部と前記外壁部との境界部分に設けられて前記内壁部及び前記外壁部が前記外壁部を構成する外方胴部よりも外側に突出した環状フランジ部を含み、
前記環状フランジ部を構成する前記内壁部の前記内方胴部との境界部分には、前記外壁部側を凸として湾曲する内湾曲部が形成されていると共に、前記環状フランジ部を構成する前記外壁部の前記外方胴部との境界部分には、前記内壁部側を凸として湾曲する外湾曲部が形成されており、
前記内湾曲部と前記外湾曲部との隙間が、前記環状フランジ部の他の部分の隙間よりも狭くなっている、二重壁容器。 an inner wall portion having an inner body portion that forms the inner surface of the recess that is open at one end;
a double-walled container comprising: an outer wall portion having an outer body portion which is provided continuously from the inner wall portion with a gap from the inner wall portion and forms an outer surface of the container,
One of the inner wall portion and the outer wall portion has a mounting portion to which a cover member covering the opening is mounted at the end on the opening side, and the mounting portion includes a plurality of engaging projections provided on the cover member. A plurality of engagement grooves are provided in which the parts are engaged,
and a reinforcing portion for reinforcing the mounting portion is provided along the circumferential direction at a boundary portion between the inner wall portion and the outer wall portion,
The mounting portion is provided on the inner wall portion,
The reinforcing portion includes an annular flange portion provided at a boundary portion between the inner wall portion and the outer wall portion, the inner wall portion and the outer wall portion protruding outward from an outer trunk portion forming the outer wall portion,
An inner curved portion that curves convexly toward the outer wall portion is formed at a boundary portion between the inner wall portion that constitutes the annular flange portion and the inner trunk portion. An outer curved portion is formed in a boundary portion between the outer wall portion and the outer trunk portion, and the outer curved portion is curved so as to be convex toward the inner wall portion side,
A double-walled container, wherein the gap between the inner curved portion and the outer curved portion is narrower than the gap between the other portions of the annular flange portion . 一端側が開口する凹部の内面を形成する内方胴部を有する内壁部と、
前記内壁部から連続して当該内壁部とは隙間を空けて設けられて容器の外面を形成する外方胴部を有する外壁部と、を備える二重壁容器であって、
前記内壁部又は前記外壁部の一方は、前記開口側の端部に当該開口を覆う蓋部材が装着される装着部を有し、該装着部には、前記蓋部材が備える複数の係合凸部が係合される複数の係合溝が設けられており、
且つ前記内壁部と前記外壁部との境界部分には、前記装着部を補強するための補強部が周方向に沿って設けられており、
前記装着部には、前記開口側の端部から前記係合溝に向かって延在し前記係合凸部を前記係合溝に誘導する誘導溝が設けられており、
前記補強部は、前記誘導溝の底面から突出するように前記誘導溝の前記開口側の端部に設けられ、かつ前記装着部の表面よりも高さの低い補強リブを含む、二重壁容器。 an inner wall portion having an inner body portion that forms the inner surface of the recess that is open at one end;
a double-walled container comprising: an outer wall portion having an outer body portion which is provided continuously from the inner wall portion with a gap from the inner wall portion and forms an outer surface of the container,
One of the inner wall portion and the outer wall portion has a mounting portion to which a cover member covering the opening is mounted at the end on the opening side, and the mounting portion includes a plurality of engaging projections provided on the cover member. A plurality of engagement grooves are provided in which the parts are engaged,
and a reinforcing portion for reinforcing the mounting portion is provided along the circumferential direction at a boundary portion between the inner wall portion and the outer wall portion,
The mounting portion is provided with a guide groove that extends from an end on the opening side toward the engagement groove and guides the engagement protrusion to the engagement groove,
The double-walled container, wherein the reinforcing portion includes a reinforcing rib provided at the end of the guide groove on the opening side so as to protrude from the bottom surface of the guide groove and having a height lower than the surface of the mounting portion. . 前記内壁部と前記外壁部とは、前記開口側の端面を形成する連結部を介して連結されており、
前記補強部は、前記連結部の前記装着部側の端部から離間した位置に突出して設けられて円周方向に亘って連続する環状リブを含む、請求項１１に記載の二重壁容器。 The inner wall portion and the outer wall portion are connected via a connecting portion forming an end face on the opening side,
12. The double-walled container according to claim 11, wherein the reinforcing portion includes an annular rib that protrudes at a position spaced apart from the end of the connecting portion on the mounting portion side and is continuous in the circumferential direction. 前記環状リブの側面と前記連結部の表面とで形成される隅部の角度が鋭角である、請求項１２に記載の二重壁容器。 13. The double-walled container according to claim 12 , wherein the corner angle formed by the side surface of said annular rib and the surface of said connecting portion is acute. 前記環状フランジ部は、前記内壁部と前記外壁部とを圧潰して折り目を付けることによって形成されており、当該環状フランジ部を構成する前記内壁部と前記外壁部との隙間は、前記内方胴部と前記外方胴部との隙間よりも狭くなっている、請求項１０に記載の二重壁容器。 The annular flange portion is formed by crushing and creases the inner wall portion and the outer wall portion. 11. A double-walled container according to claim 10 , wherein the container is narrower than the gap between the body and said outer body.
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